Academic literature on the topic 'Acoustic Comfort'
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Journal articles on the topic "Acoustic Comfort"
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WEN, Xin, Qi MENG, Da YANG, and Mengmeng LI. "Effects of indoor thermal-acoustic interaction on comfort and facial expression." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 7 (October 4, 2024): 4303–11. http://dx.doi.org/10.3397/in_2024_3442.
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While thermal-acoustic interaction is considered that to have an effect on comfort perceptions, the interaction effects of these factors and their impacts on perceived comfort and facial expressions have not been thoroughly investigated. In this study, the interaction effects between temperature and sound pressure levels on thermal, acoustics, overall comfort and facial expressions of young adults in offices were examined. The results showed that: (1) thermal-acoustic interaction and sound pressure levels had a significantly effect on thermal comfort, acoustic comfort and overall comfort; thermal comfort and overall comfort were significantly affected by temperature. (2) thermal-acoustic interaction had a significantly effect on the valence of facial expressions over a period from 20 to 60 seconds. (3) comfort perceptions had significantly correlations with several facial expressions.
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Roskams, Michael, Barry Haynes, Pyoung-Jik Lee, and Sang-Hee Park. "Acoustic comfort in open-plan offices: the role of employee characteristics." Journal of Corporate Real Estate 21, no. 3 (September 9, 2019): 254–70. http://dx.doi.org/10.1108/jcre-02-2019-0011.
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Purpose This paper aims to determine the extent to which employees’ experiences of acoustic comfort, well-being and productivity in open-plan offices are determined by specific characteristics (including demographic information, task characteristics, and personality traits). Design/methodology/approach A questionnaire was distributed to the occupants of three open-plan office sites and was completed by 166 employees in total. Findings The results indicated that acoustic comfort in open-plan offices is largely determined by noise sensitivity. Higher noise sensitivity was associated with more negative ratings of acoustical quality, more perceived disturbance by speech and more difficulties in concentration. More negative experiences were also reported by employees with lower interactivity with colleagues. Practical implications There is significant inter-individual variability in experiences of acoustic comfort, well-being and productivity in open-plan offices. As such, workplace practitioners should consider acoustic and behavioural solutions for introducing a greater diversity of functional workspaces within the office, so that employees can choose the most suitable working area for their requirements. Originality/value Whereas the majority of past acoustics research has been laboratory-based, this study is conducted in real office environments with a representative sample of knowledge workers.
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Amran, M. Mohd, M. Shaiful Rizal, I. Maznan, Mohd Nazrul Roslan, Y. Musli Nizam, Mohd Imran Ghazali, and M. Shahruddin. "Evaluation of Sound Comfort in Examination Hall Using Acoustical Environmental Analyses." Applied Mechanics and Materials 315 (April 2013): 825–29. http://dx.doi.org/10.4028/www.scientific.net/amm.315.825.
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Acoustics environmental analyses were conducted in the unoccupied examination hall at Universiti Tun Hussein Onn Malaysia (UTHM), in order to determine the acoustical environment which reflects to sound comfort during sitting exam. The acoustic parameters that measured are background noise level, sound pressure level and reverberation time. The analysis result of untreated wall condition (without absorbent material) was revealed poor while treated wall condition (with absorbent material) revealed the improvement result. Installation of absorbent material on the wall and speakers rearrangement had reduced the highest background noise level of examination hall average reverberation times. A minor alteration at examination hall had contributed to better acoustic performance.
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CANSU, Nicole, Greta ÖHLUND WISTBACKA, Sofia HOLMQVIST-JäMSéN, Roland RYDELL, Emma ARVIDSSON, and Viveka LYBERG ÅHLANDER. "Acoustic refurbishments in a university lecture room: effects on speaker's comfort and voice use." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 6 (October 4, 2024): 5254–61. http://dx.doi.org/10.3397/in_2024_3566.
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Poor acoustic conditions in learning spaces have a detrimental effect on the speaker´s health and constitutes a risk factor for voice disorders. Previous research indicate that an acoustic refurbishment of the learning space has the potential to increase well-being and decrease voice related health problems among teachers, but the research is scarce. In this study, we aim to investigate how different acoustic conditions affect the speakers voice use and self-perceived speaker's comfort. Voice recordings of short speech-tasks and self-evaluations of speaker's comfort were collected from fifteen participants during a three-step acoustic refurbishment of a real-life university lecture room in an experimental setting. The influence of background babble and a classroom soundfield amplification system on vocal parameters and self-perceived speaker's comfort were also investigated. Factor analysis of the speaker's comfort questionnaire revealed a two-factor solution where factor 1 represented vocal behavior and perception of room acoustics, and factor 2 represented the perception of the task in itself. Sum scores for factors 1 and 2 will be calculated and used in a mixed-effects model investigating the effect of room acoustics on self-perceived speaker's comfort.
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Miqueau, Valentin, Etienne Parizet, and Sylvain Germes. "Psycho-acoustic evaluation of the automotive acoustic comfort using vibro-acoustic prediction methods." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (August 1, 2021): 703–14. http://dx.doi.org/10.3397/in-2021-1630.
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In the automotive industry, the acoustic comfort is considered as a selling point of utmost importance. To help the OEMs improve the acoustic comfort in cars, as a one-tier supplier of automotive glazing, Saint-Gobain is currently working on the acoustic comfort within the cabin in order to propose the right set of glazing consistent with the OEMs' specifications. The characterization of the acoustic comfort mostly relies on physical demonstrators required for carrying out the relevant measurements. It is however not available early in the project phase, delaying the subjective analysis late in the development phase. To have the opportunity to develop effective solutions, the acoustic comfort has to be investigated as early as possible in the design process. Saint-Gobain is thus currently developing relevant acoustic models in order to predict the mid-high frequency airborne interior noise generated by the wind excitations. The subjective acoustic comfort has then to be assessed using the predicted interior sound pressure levels converted into audio soundtracks for the auralization purposes. In this paper, we briefly present the Statistical Energy Analysis model developed by Saint-Gobain. The psychoacoustic methodology deployed to evaluate its reliability for the subjective evaluation of the automotive acoustic comfort is detailed.
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Andargie, Maedot S., Marianne Touchie, and William O'Brien. "Subjective and objective evaluation of the impact and airborne sound insulation of multi-unit residential buildings." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (August 1, 2021): 778–86. http://dx.doi.org/10.3397/in-2021-1648.
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Multi-unit residential building (MURB) occupants often express dissatisfaction with their suites' acoustic conditions despite existing building acoustic standards and regulations as well as growing research on noise control and building acoustics. Reasons for this include the lack of proper characterization of acoustic comfort in MURBs and lack of comprehensive and stringent regulations. To better understand factors that impact acoustic comfort and explore strategies to improve the acoustic performance of MURBs, investigations of acoustic conditions were carried out. This work presents the results of the investigations which include subjective and objective evaluations of acoustic conditions in two MURBs. Impact sound insulation measurements using both a tapping machine and a rubber ball as well as 24-hour indoor noise monitoring were carried out in unoccupied suites. An online survey was then used to collect subjective assessments of the noise conditions in the buildings and the effects on occupants' comfort post occupancy. Results of the data analysis suggest that occupants are more sensitive to low-frequency impact sounds than mid- and high-frequency impact noise.
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Wu, Yue, Qi Meng, Lei Li, and Jingyi Mu. "Interaction between Sound and Thermal Influences on Patient Comfort in the Hospitals of China’s Northern Heating Region." Applied Sciences 9, no. 24 (December 17, 2019): 5551. http://dx.doi.org/10.3390/app9245551.
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Previous studies have found that hospitals are often inadequately ventilated in the heating region of China, which causes an increased risk of negative impacts on patients. The complex interaction between thermal comfort and acoustics presents considerable challenges for designers. There is a wide range of literature covering the area of the interaction between the sound–thermal, sound–odor, and acoustic–visual influences, but a focused research on the sound –thermal influence on comfort in hospitals has not been published yet. This paper describes a series of field measurements and subjective evaluations that investigate the thermal comfort and acoustic performance of eighteen hospitals in China. The results showed that the thermal comfort in the monitored wards was mostly acceptable, but the temperatures tended to be much higher and the humidity much lower, in practice than they were designed to be in the heating season. The most significant conclusion is that a positive thermal stimulus can create a comfortable thermal environment, which can improve patients’ evaluation of the acoustics, while a negative stimulus has the opposite effect. A comfortable acoustic environment also caused patients to positively evaluate thermal comfort. Moreover, the relationship between thermal and sound effects in the overall evaluation showed that they are almost equal.
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Glean, Aldo A., Stanley D. Gatland, and Ihab Elzeyadi. "Visualization of Acoustic Comfort in an Open-Plan, High-Performance Glass Building." Buildings 12, no. 3 (March 11, 2022): 338. http://dx.doi.org/10.3390/buildings12030338.
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The aesthetic and functional appeal of high-performance, open-plan office buildings presents special challenges. Extensive use of glass at the building’s perimeter to improve visual comfort and office communication can negatively impact acoustic comfort without proper design considerations. This study investigates the utility of a novel visualization approach to documenting the interactional impact of acoustical comfort on the health and well-being of occupants in an open-office environment. Room acoustic measurements of background noise and speech transmission index were conducted and distraction distances were calculated and visualized using a mapping technique. In addition, a comprehensive pre- and post-occupancy evaluation protocol was employed. The paper illustrates the reliability of the visualization approach to aid in the interpretation and comparison of various open-office acoustic solutions from a human-centric acoustic environment perspective.
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Ayinla, Abdulrasaq Kunle, Glory Ndifrekeabasi Ekpo, Ilelabayo Ismail Adebisi, and Olusola Oladapo Makinde. "Correlates of Acoustic and Visual Comforts in Selected Lecture Theaters in Ladoke Akintola University of Technology, Ogbomoso, Nigeria." International Research Journal of Natural Sciences 11, no. 1 (January 15, 2023): 13–23. http://dx.doi.org/10.37745/irjns.13/vol11n11323.
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The challenge of having good acoustics and visual comfort in lecture theatres was explored in the study. The aim was to evaluate the visual and acoustic comfort levels of users in lecture theatres with a view to establishing their significance in future designs. The study selected seven (7) lecture theatres representing 58.33% out of a total of 12 in Ladoke Akintola University of Technology Ogbomoso as the sample size using simple random sampling techniques. Capacity of each lecture theatres were determined and questionnaires were randomly administered on 4% of the total Users in each. The questionnaire was to determine the hearing audibility levels, visual clarity levels and general comfort/satisfaction levels of users at periods they were receiving lectures. A total of 248 questionnaires were administered. Sources of noise in the lecture theatres were also determined through questionnaire administration. Data were descriptively and inferentially analysed. The study found furniture movements as the major source of noise in the lecture theaters studied. Also, it was realized that there was a significant correlation between users’ satisfaction levels and each of visual clarity and hearing audibility (acoustic comfort) despite that users indicated that it was possible for them to hear speaker’s speeches without seeing the board; It was hence suggested that determinant factors of these two criteria such as shape of buildings, sizes/volume and sources of noise should be critically put into consideration at design inception stages. Other recommendations that could foster appropriate synergy between acoustic and visual comforts in Lecture Theatres were given.
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Jalil, Nurul Amira Abd, Nazli Bin Che Din, and Nila Inangda Manyam Keumala Daud. "A Literature Analysis on Acoustical Environment in Green Building Design Strategies." Applied Mechanics and Materials 471 (December 2013): 138–42. http://dx.doi.org/10.4028/www.scientific.net/amm.471.138.
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Acoustic quality is important in ensuring a healthy and workable working environment. One of green buildings main objective is to reduce the building impact on human health and performance. This was emphasized in most green building rating system under its requirement for Indoor Environmental Quality (IEQ). IEQ highlights the four main points for achieving an improved indoor environment: indoor air quality, acoustics, visual comfort (lighting) and thermal comfort. Although acoustics was mentioned in the IEQ criteria, according to previous surveys and studies; acoustics quality in green buildings were not improving. It seems as though in order to improve on other green building criteria, acoustics performance is bound to become poorer. Through review of previous literature, survey and studies on acoustical performance in green buildings, the objective of this paper is to identify how green building design strategies contribute to the degradation of acoustical environment in green office buildings. Findings shows that design strategies implemented to cater for other green building requirements such as natural ventilation, daylight, reduction of finishes and office layout have unintentionally decrease the acoustical quality.
Dissertations / Theses on the topic "Acoustic Comfort"
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Hanson, R. E. "Towards a practical method for ranking acoustic comfort in structurally connected dwellings in England : motivating improvements in, and understanding of, acoustic comfort." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/18697/.
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This study focuses on occupant acoustic comfort in domestic dwellings in England and asks how potential buyers and other interested parties can identify likely ‘quiet homes’ and likely ‘noisy homes’. To answer this question, the roles of building regulations, acoustic comfort classification schemes, building contractor and type of dwelling are investigated. The first of these investigations examines the effectiveness of building regulations at delivering homes built to standards that ensure satisfactory levels of occupant acoustic comfort. The investigation is undertaken through interviews with key personnel in Government and industry. The conclusions are that regulatory standards for sound transference between dwellings have changed little since they were introduced in 1965 (in force 1966) and continue today to remain too low and too poorly enforced to be relied upon to deliver adequate acoustic comfort levels for many occupants. The second focus of study concerns acoustic comfort rating schemes developed in a number of other countries. How these schemes work, their influence on improving acoustic comfort levels and their suitability for England are investigated through interviews with key people that developed them, practising acousticians and government employees. The key findings indicate that few people are aware of rating schemes in their respective countries and that similar number-based schemes are unlikely to be effective in England due to lack of government and industry interest. The third investigation aims to find out if different building contractors in England build their dwellings to different levels of acoustic comfort to those of their competitors. This qualitative investigation is carried out though an attitudinal survey of all major building contractors operating in England. Data is collected by letter written from the standpoint of a potential buyer. The investigation shows contractors only building to minimum regulatory standards and not competing with each other on levels of acoustic comfort. The fourth section of the study aims to found out occupant and buyer attitudes towards acoustic comfort. The quantitative survey collected data through an on line questionnaire. The findings reveal that acoustic comfort is a concern for many occupants, dwelling type is related to acoustic comfort and that prior to buying a home, acoustic performance is an important consideration for many purchasers. Overall this thesis concludes that after over forty years of regulating sound insulation, regulatory standards have not improved, remain poorly enforced, and are of a level too low to ensure satisfactory levels of acoustic comfort for many occupiers; and that measurement based acoustic comfort classification schemes are unsuitable for England, leaving type of dwelling as the only guide to acoustic comfort for consumers. Given the importance occupants and buyers place upon acoustic comfort this is a significant finding of practical value.
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Carbajo, Alix. "Analysis of vibro-acoustic comfort for engine with deactivated cylinders." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI101.
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Afin de réduire les consommations de carburant et les émissions de CO2, des technologies comme la désactivation de cylindres ont été développées. Deux stratégies ont été à l’étude chez le Groupe PSA, il s’agit de désactivations appelées fixe ou tournante en fonction du nombre de cylindres désactivés au cours d’un cycle moteur. Des modifications importantes du bruit et des vibrations transmises dans l’habitacle de la voiture en sont les conséquences ce qui modifie nettement la perception du confort par le conducteur de la voiture. Ce travail de recherche s’intéresse aux modifications de confort perçu par le conducteur dues à ces différentes stratégies appliquées au moteur ainsi qu’aux solutions potentielles qui permettraient d’améliorer ce confort. Parmi ces solutions se trouve le principe de sonification en temps réel du bruit moteur. Pour répondre à ces questions, cinq tests perceptifs sont réalisés. Les deux premiers consistent en l’évaluation du confort global dans différentes configurations ainsi qu’à la validation de l’utilisation d’un simulateur vibro-acoustique. Ces expériences ont montré qu’une des stratégies de désactivation était jugée significativement plus inconfortable que les autres. Par la suite, une seule des stratégies sera retenue. La troisième expérience permet de déterminer un seuil d’acceptabilité entre les sollicitations du moteur avec désactivation et celles du moteur habituel. Ceci afin de fixer une cible pour laquelle l’environnement vibro-acoustique serait acceptable. Dans les deux dernières expériences, deux solutions permettant d’atteindre cette cible sont simulées. La première consiste à modifier la plage de régime moteur ou à lieu la désactivation, la deuxième consiste à assouplir les suspensions horizontales afin de limiter les résonances vibratoires à faible régimeThe technology of cylinder of deactivation has been developed in order to reduce gas consumption and CO2 emissions. Two strategies were studied at groupe PSA called fixed and rotating deactivations depending on the number of cylinders deactivated per engine cycle. This implies non neglecting modifications of sound and vibrations transmitted to the car cabin depredating the global comfort of the car. This research work focused on how driver’s comfort was altered by these engine configurations and how it would be possible to improve this comfort. Among the solutions possible, appears the principle of real-time sonification of the engine noise. To answer these questions, five perceptual experiments have been conducted. First, the aim was to evaluate global comfort with different engine configurations and validate the use of a vibro-acoustic simulator. This showed that one deactivation strategy was significantly reducing the comfort evaluation. Then, we focused on the second strategy which was also considered as not comfortable. On the third experiment, we were interested in finding an acceptable threshold between the vibrations and sounds with the deactivation and with the usual engine configuration. This led to a target of signal to reach in order to provide acceptable situations in terms of sound and vibrations. In the last two experiments, we were interested in the simulation of two solutions about the deactivation settings that would reduce the annoyance: the modification of the engine speed range in which the deactivation occurs and the softening of horizontal suspensions part in order to reduce vibrations resonances at low engine speed
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CLAUDI, Livia. "A soft-sensing approach for measuring acoustic comfort in buildings." Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263188.
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Il benessere degli occupanti è uno degli aspetti principali da considerare nella progettazione e nel rinnovamento degli edifici. L'ambiente interno influisce in modo significativo sulla salute e sulla produttività del lavoro. Il comfort è un concetto molto ampio, poiché riguarda molteplici aspetti (qualità dell'aria interna, comfort acustico, termico e visivo). Il comfort acustico è un argomento complesso a causa della sua dipendenza da variabili fisiche e fisiologiche. Nonostante sia un concetto importante, esso è vagamente definito ed esplorato in letteratura. Infatti, seppur il settore delle costruzioni si trova a far fronte al problema della riqualificazione degli edifici esistenti per aumentarne le prestazioni, il comfort acustico non è ancora uno dei principali fattori considerati a causa della mancanza di procedure di riferimento olistiche. La ricerca presenta lo sviluppo e l'applicazione di una metodologia per misurare il comfort acustico degli edifici, utilizzando un approccio di tipo soft-sensing. Il soft-sensor fornisce un sistema di misurazione, che tiene conto di dati sperimentali, simulati, assunti e soggettivi, attraverso i quali è possibile valutare la qualità acustica dell'edificio, in relazione al livello di rumore esterno circostante. La metrica è rappresentata da Key Performance Indicators (KPIs), i quali esprimono il comfort acustico degli edifici e rendono possibile il confronto tra le prestazioni acustiche di diversi edifici esistenti. Il sistema di valutazione basato su KPIs può essere applicato anche nelle ristrutturazioni degli edifici per valutarne la qualità acustica prima e dopo il rinnovamento, supportando le parti interessate nella fase di valutazione. In particolare, sono stati sviluppati due KPIs: il "KPI oggettivo", che fornisce informazioni sul comfort acustico dell'edificio, attraverso un valore normalizzato per la quantificazione semplificata delle prestazioni acustiche, e il "KPI soggettivo", che mira a validare il "KPI oggettivo", poiché si basa sulla valutazione del giudizio degli occupanti nei confronti del comfort acustico. Diversi casi di studio sono utilizzati per dimostrare la fattibilità della metodologia sviluppata basata su soft-sensor, utilizzando misurazioni in-situ, combinate con modelli di calcolo e dati soggettivi. Le analisi di sensibilità e di incertezza sono state eseguite per stabilire in che modo l'accuratezza della misura dei KPIs influisce sul processo decisionale. L'applicazione della metodologia ha mostrato risultati promettenti nell'individuazione della migliore strategia di retrofit. Il soft-sensor per la misurazione del comfort acustico degli edifici è stato sviluppato ed integrato all’interno del progetto di ricerca europeo New TREND (H2020) ed applicato su un edificio dimostratore del progetto stesso, per dimostrarne la fattibilità e l'affidabilità.Occupants’ well-being is one of the main aspects to be considered in buildings design and refurbishment. The indoor environment impacts significantly on health and work productivity. Comfort is a very broad concept since it regards multiple aspects (indoor air quality, acoustic, thermal and visual comfort). Acoustic comfort is a complex topic because of its dependence on both physical and physiological variables. Despite being an important concept, it is vaguely defined and explored in literature. In fact, although the construction industry is facing the issue of requalifying existing buildings to increase performance, acoustic comfort is not yet one of the main drivers due to the lack of holistic reference procedures. The research presents the development and the application of a methodology for measuring acoustic comfort of buildings, using a soft-sensing approach. The soft-sensor provides a measurement system, which takes into account experimental, simulated, assumed and subjective data, through which the building acoustic quality, in relation to the outdoor surrounding noise level, can be evaluated. The metric is represented by Key Performance Indicators (KPIs), which express buildings acoustic comfort and make possible the comparison among performance of different existing buildings. The evaluation system based on KPIs can be applied in buildings renovations for evaluating the acoustic quality of buildings before and after the retrofitting, supporting the stakeholders in the evaluation stage. In particular, two KPIs have been developed: the “objective KPI”, which provides information regarding the acoustic comfort of the building, with normalized value for simplified quantification of acoustic performance, and the “subjective KPI”, which aims at validating the objective one, since it is based on the assessment of the occupants’ rating. Several case studies are used to demonstrate the exploitability of the soft-sensing method, using in-field measurements combined with calculation models and subjective data. Sensitivity and uncertainty analyses are performed to establish how the accuracy of the KPIs measurement impacts on the decision-making process. The application of the methodology has shown promising results in the identification of the best retrofit strategy. The soft-sensor system for buildings’ acoustic comfort measurement has been integrated within the European project New TREND (H2020) and applied on one demo-case in order to demonstrate its usability and reliability.
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Torresin, Simone. "Indoor soundscape modelling: Rethinking acoustic comfort in naturally ventilated residential buildings." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/327411.
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The connection with the outdoor acoustic environment created by open windows has so far been one of the main impediments to the adoption of natural ventilation (NV), due to indoor noise levels easily exceeding design requirements. Starting from the apparent conflict between ventilation and acoustic comfort needs, and the potential offered by NV for low-energy cooling and ventilation, the study explores the opportunities for shaping healthy and supportive acoustic environments through sound transmitted via ventilation openings. The research question challenges the traditional approach to acoustic design, which assumes noise annoyance reduction by merely reducing decibel noise levels, drawing inspiration from the soundscape concept. Soundscape science characterises the human response to the acoustic environment in context and can help understand if and how NV may contribute to defining spaces that sound good to their occupants. The aim is to go beyond an exclusive focus on the ‘noise’ – ‘noise annoyance’ binomial, and to employ ‘wanted’ sounds as a design resource for creating acoustically pleasant environments. However, the soundscape framework, as described by ISO 12913 standard series, has been primarily developed for use in the context of urban planning. This has led to question (i) how the soundscape approach can be applied to the indoor built environment, (ii) what factors positively influence it and (iii) how it can be measured in residential buildings. A systematic literature review categorized the factors that positively influence acoustic perception in domestic environments, highlighting its strongly multi-factorial nature. Beyond noise level, a combination of acoustic and non-acoustic factors was found to affect acoustic perception, such as the urban context, house and person-related factors, socio-economic, situational, and environmental factors. The study benefited from a round of interview with experts in the field of urban soundscape, indoor soundscape, acoustic design, and public health and well-being. The collective discussion encompassed the characterization, management, and design of indoor (and indoor versus outdoor) soundscapes to identify current research gaps in the objective and subjective evaluation of the indoor acoustic environments. In response, based on a laboratory listening test, a model of perceived affective quality of indoor acoustic environments has been derived to guide the measurement and improvement of indoor residential soundscapes. During the test, 35 participants were asked to rate 20 different sound scenarios each. Scenarios were defined by combining four indoor sound sources and five urban environments, filtered through a window ajar, on 97 attribute scales. Comfort, content, and familiarity were extracted as the main perceptual dimensions explaining respectively 58%, 25% and 7% of the total variance in subjective ratings. A measurement system was proposed, based on a 2-D space defined by two orthogonal axes, comfort, and content, and two derivative axes, engagement and privacy – control, rotated 45° on the same plane. The model was tested in a large-scale online survey to assess the influences of different acoustic and non-acoustic factors on indoor soundscape dimensions, window-opening behavior, and occupant well-being. Evaluating the affective response to the indoor acoustic environment through the comfort – content model helped identifying the impacts that acoustical factors (e.g., sound typology), building (e.g., house size), urban (e.g., availability of a quiet side), situational (e.g., number of people at home), and person-related factors (e.g., noise sensitivity) determine on building occupants depending on the specific activity people are engaged with at home, reaching a more in-depth knowledge compared to appraisals based on annoyance evaluation alone. By disentangling the positive and negative contributions of sound stimuli according to people’s perception, it was possible to highlight the opportunity provided by NV to create a sense of place and enhance indoor soundscapes, providing useful masking opportunities in the presence of disturbing indoor noise sources. Results pointed to the existence of benefits from NV able to compensate for a reduced acoustic comfort in case of outdoor acoustic pollution. However, the availability of ‘positive’ urban soundscapes is essential for occupants’ well-being, and is linked primarily to access to natural sounds, but also to other commonly available urban sounds. The ‘quieter’ is therefore not always the better, but it really depends on the composition of indoor and outdoor sound types according to people’s preference and on the interaction with different domains (e.g., visual). Such evidence reinforces the role of acoustics in building and urban design, integrated with the other disciplines involved and based on multi-domain research. Overall, the doctoral study contributes to framing the ‘indoor soundscape’ concept, addressing scientific, industrial, social, and environmental implications, and suggesting future lines of research.
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Riffelli, Stefano. "Sustainable comfort in indoor environments: global comfort indices and virtual sensors." Doctoral thesis, Urbino, 2022. http://hdl.handle.net/11576/2700929.
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Montoschi, Federico. "How the layout can improve the acoustic comfort in a museum exhibit hall: a new predictive model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20107/.
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La maggior parte dei musei italiani è allestita all'interno di edifici storici che non nascono per questa destinazione d'uso. Le sale espositive risultano quindi non ottimali per il comfort acustico. Nei casi di elevata affluenza questo può arrivare ad influenzare la qualità della fruizione. Si è quindi provveduto a qualificare l'acustica di una sala espositiva e a monitorarne l'attività antropica, che è la principale sorgente di rumore. Il caso studio è il Salone del Nicchio, la prima sala espositiva del Museo Archeologico Nazionale di Firenze, situato all'interno del seicentesco Palazzo della Crocetta.
La sala è stata qualificata mediante misure di qualità acustica a norma ISO 3382 e misure fonometriche di background noise. Queste ultime risultano influenzate da molteplici aspetti, quali le interazioni tra il livello di emissione della voce e il rumore di fondo ed i processi comportamentali di feedback. È stato applicato un nuovo modello previsionale, calibrato per mezzo di dati sperimentali, per l'ottimizzazione del layout espositivo e dei flussi di persone al fine di migliorare il comfort acustico nella sala.
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Dahlan, Nur Dalilah. "Occupant's indoor comfort perceptions through thermal, visual & acoustic assessments in typical multi-storey hostels in Malaysia." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54503/.
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This study focuses on assessing the effects of the indoor climate on student occupants in typical multi-storey hostels in Malaysia through objective, subjective and evidence based prioritisation measurements. The objective measurements consisted of operative temperature daylight ratio luminance and sound pressure level. The subjective measurements were sampled from the student occupants' thermal, visual, acoustic and overall indoor comfort votes. The prioritisation measurement using Multiple Linear Regression and Friedman Tests assessed the relationship between physical indoor thermal, visual and acoustic conditions and students' overall indoor comfort perception vote. The investigations were conducted throughout a two month period starting form 12th May until 3rd July 2007. The hostels selected were namely, Twelfth Residential College, Universiti Malaya (H1) Eleventh Residential College, Universiti Putra Malaysia (H2) and Murni Student Apartment, Universiti Tenaga Nasional (H3). These hostels were located in the Klang Valley district. In general, the findings showed that despite the temperature, daylight ratio and sound pressure level differences recorded in the objective measurement, the subjective surveys showed almost identical thermal, visual and acoustic comfort perception votes (i.e.: within the neutral vote category) regardless of the room location (i.e.: floor level and orientations) in each hostel. However, comparison between thermal comfort responses from student occupants in different hostels showed that occupants staying in shaded rooms (in HI) were slightly cooler than the ones staying in un-shaded rooms (in H2 and H3). There was a corresponding different in temperature of 3° C between the un-shaded and shaded rooms.
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Araujo, Bianca Carla Dantas de. "Proposta de elemento vazado acústico." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/16/16132/tde-01062010-102405/.
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O conforto ambiental requer a busca de alternativas de projeto que promovam menos impacto energético na arquitetura. Em locais de climas quentes e úmidos, a ventilação natural é uma das estratégias de projeto; inseridos nesta visão, os elementos vazados (cobogós ou combogós, com são popularmente conhecidos no nordeste brasileiro) agem como componentes arquitetônicos que proporcionam permanente ventilação natural, proteção solar e iluminação natural, além de facilidade de fabricação. Apesar do uso secular dos elementos vazados, eles perderam espaço na produção arquitetônica contemporânea, e são raras pesquisas com vistas a aprimorar seu potencial como alternativa passiva de projeto. Entretanto, existe consciência dos problemas acústicos correlatos que advém da sua utilização na ventilação natural, tais como o comprometimento na isolação dos ruídos externos e na privacidade entre ambientes. O presente trabalho, por esses motivos, tem por proposta desenvolver um elemento vazado acústico, objetivando utilizá-lo na minoração do problema da dicotomia entre os aspectos térmicos e acústicos envolvidos. O desempenho do isolamento sonoro in situ dos elementos criados foi avaliado com base na Norma ISO 140-5, tendo sido também estudado o desempenho da ventilação natural através de simulações computacionais, utilizando métodos da dinâmica dos fluidos computacional - CFD. Foram desenvolvidos 4 tipos de blocos, todos eles avaliados em diferentes montagens numa parede do tipo fachada, segundo 3 condições: fechados e abertos (com e sem material absorvente). Os resultados revelaram o quão susceptível é a transmissão do ruído em aberturas de ventilação, entretanto, resultados satisfatórios de isolamento sonoro foram obtidos, principalmente em uma das montagens (bloco tipo 3, caixa), a qual apresentou desempenho similar ao bloco fechado com um Índice de Redução de Ruído Padrão Global (Dntw) de 27 dB. Esta montagem apresenta relação de área aberta satisfatória para promover a ventilação natural dentro de um ambiente (confirmada pelo melhor desempenho comparativo de ventilação dos blocos simulados), além de apresentar isolamento sonoro superior ao de outros (poucos) elementos existentes no mercado, com o objetivo de promover a ventilação natural e reduzir a transmissão de ruído para se obter bom desempenho.The environmental comfort requires the search for design alternatives that promote less energy impact on architecture. In places with hot and humid climates, natural ventilation is one of design strategies; into this vision, the hollow elements (cobogós or combogós, as popularly known in northeastern Brazil) act as architectural components that provide permanent natural ventilation, sun protection and natural lighting, and ease of manufacture. Despite the secular use of hollow elements, they lost space in contemporary architectural production, and there are few surveys with a view to enhancing its potential as an alternative passive design. However, there is awareness of the problems related noise that comes from its use in natural ventilation, such as commitment in the isolation of external noise and privacy between environments. In this work, for these reasons, the proposal is to develop an element hollow sound, aiming to use it in alleviating the problem of the dichotomy between the thermal and acoustic aspects involved. The performance of sound insulation in situ of the elements created was assessed based on the ISO 140-5, was also studied the performance of natural ventilation through computer simulations, using methods of computational fluid dynamics - CFD. Were developed 4 types of blocks, all studied at different mounts on a wall like facade, according to 3 conditions: closed and open (with and without sound absorption material). The results revealed how likely is the transmission of noise from the vent, however, satisfactory sound insulation were obtained, especially in one of the mounts (block type 3, box), which presented a performance similar to a closed block with index Noise Reduction Global Standard (Dntw) of 27 dB. This assembly has an open area ratio of satisfactory to promote natural ventilation in an environment (confirmed by the comparative performance of simulated ventilation of the blocks), while maintaining sound insulation than the other (few) elements in the market, with the objective to promote natural ventilation and reduce noise transmission to achieve good performance
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Kritikou, Sofia Kristina. "Evaluation of acoustic, visual and thermal comfort perception of students in the Educational Building at KTH Campus : A study case in a university building in Stockholm." Thesis, KTH, Installations- och energisystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239429.
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In recent years the focus and application of sustainability in buildings has risen. Both for environmental and human well-being reasons. The quality of the indoor environment affects the well-being, productivity and work performance, but it can also affect the occupants negatively, like increasing risks of different diseases and health issues. A good indoor environment alongside with sustainable materials, proper HVAC (Heating, ventilation, and air conditioning) installations and building code regulations contribute to a sustainable solution with low environmental impact and reduced energy consumption. Since buildings alone are responsible for 38% of all human GHG (Greenhouse gas) emissions (Wikipedia, 2017), most countries recommend new more sustainable solutions to reduce that percentage. For example, in the EU, the 2020 climate and energy package targets to: cut 20% in greenhouse gas emissions, 20% of EU energy from renewables and 20% improvement in energy efficiency (European Comission, n.d.). In addition to the positive aspect of low environmental impact new constructions have, they also create a good living or working environment for the users. Studies have shown that a better indoor quality increases the productivity and work performance, but most of all the occupants feel comfortable and satisfied with their environment. A great number of papers have reviewed the acoustic, visual, thermal comfort and indoor air quality, which are main aspects of the indoor climate. Most papers focus on the users’ perception of these four aspects as well as other parameters that influence the indoor environment (architectural geometry, materials, etc.). Similarly, in this study case I focus on two different methods of obtaining the results, the objective method that contains the indoor environment measurements and the subjective method which includes a questionnaire created specifically for this research project. By obtaining these two sets of data, key focus points are developed, such as if the building’s certification meets the recommendations of Miljöbyggnad, what aspects influence the students’ perception the most, and whether there are any distinct connections between measured and calculated data. This study case was developed in a university building in Stockholm, where the four main aspects of the indoor environment were evaluated. The physical parameters such as temperature, air velocity, relative humidity, CO2 concentration and acoustics were measured in five different classrooms. In addition, a survey was developed for this study which included perception questions of the thermal, visual, acoustic comfort and indoor air quality. As found in other studies, gender and climate zone origin affected the overall indoor environmental perception. Even though the majority of both genders voted for “no change”, the remaining females answered that they preferred the conditions warmer. Also, the majority of answers from all climate zones were “no change”. However, the second highest opinion for students from warmer climate zones was “warmer”, which has also been found in other studies. Significant negative correlations were found between the acoustics and the satisfaction level of the acoustic comfort. Similarly, high correlations were observed between the visual comfort satisfaction level and the three aspects influencing it. Furthermore, the results showed that all physical measurements influenced the students’ thermal comfort and indoor air quality perception. All measurements obtained indicated a good indoor environment in all classrooms, and all values were between the Swedish Standards recommendations. Low correlation was found between the measured PVM and the AMV from the questionnaires even though all the values were among the limitations. Lastly, this study reviews methods that could be applied to similar future studies and, discusses what kind of errors to avoid in the future. There is still a lot of research that can be developed in order to gain a deeper understanding of the indoor environment and how humans perceive it.Under senare år har fokus och tillämpning av hållbarhet i byggnader ökat, både för miljö och mänskligt välbefinnande. Kvaliteten på inomhusmiljön påverkar välbefinnandet, produktiviteten och arbetsprestandan. Tyvärr kan det också påverka de anställda negativt, som ökad risk för olika sjukdomar och hälsoproblem. En bra inomhusmiljö tillsammans med applikationer av hållbara material, ordentliga HVAC-installationer och byggregler bidrar till en hållbar lösning med låg miljöpåverkan och minskad energiförbrukning. Eftersom byggnader ensamma svarar för 38% av alla mänskliga växthusgasutsläpp (Wikipedia, 2017), rekommenderar de flesta länder nya mer hållbara lösningar för att minska den procentuella andelen. I EU strävar EUs klimat- och energipaket 2020 till att; minska 20% av växthusgasutsläppen, 20% av EUs energi från förnybara energikällor och 20% förbättrad energieffektivitet (European Commission, n.d.). Förutom den positiva aspekten av låg miljöpåverkan har nya konstruktioner skapat en bra levnads- och arbetsmiljö för användarna. Studier har visat att en bättre inomhuskvalitet ökar produktiviteten och arbetsprestandan men framförallt känner sig brukarna bekväma och nöjda med sin miljö. Ett stort antal rapporter har granskats enligt akustisk, visuell, termisk komfort och inomhusluftkvalitet, som är huvudaspekterna av inomhusklimatet. De flesta rapporter fokuserar på användarnas uppfattning om dessa fyra aspekter samt andra parametrar som påverkar inomhusmiljön (arkitektonisk geometri, material osv.). På samma sätt fokuserar jag på två olika metoder för att erhålla resultaten. Den objektiva metoden som innehåller innemiljömätningar och den subjektiva metoden som innehåller ett frågeformulär som skapats specifikt för detta forskningsprojekt. Genom att erhålla dessa två uppsättningar data utvecklas viktiga fokuspunkter, till exempel om byggnadens certifiering uppfyller Miljöbyggnads rekommendationer, vilka aspekter som i huvudsak påverkar elevernas uppfattning och om det finns några tydliga samband mellan uppmätta och beräknade data. Studiefallet utvecklades i en universitetsbyggnad i Stockholm, där de fyra huvudaspekterna av inomhusmiljön utvärderades. De fysiska parametrarna mättes såsom temperatur, lufthastighet, relativ fuktighet, CO2-koncentration och akustiken i fem olika klassrum. Dessutom har en undersökning utvecklats för detta studieprojekt som inkluderade uppfattningsfrågor inom termisk, visuell, akustisk komfort och inomhusluftkvalitet. Kön och klimatzonens ursprung var två andra parametrar som påverkade den övergripande inomhusmiljöuppfattningen, enligt andra studier. Även om majoriteten av båda könen röstade för "ingen förändring" svarade restrerande kvinnor att de föredrog klasrummet varmare. Dessutom svarade flertalet från alla klimatzoner "ingen förändring", även om den näst högsta åsikten för studenter från varmare klimatzoner var "varmare", vilket också har hittats i andra studier. Höga negativa korrelationer hittades mellan akustiken och tillfredsställningsnivån för den akustiska komforten. På samma sätt observerades höga korrelationer mellan den visuella komfortnöjdhetsnivån och de tre aspekter som påverkar den. Vidare visade resultaten att alla fysiska mätningar påverkade elevernas termiska komfort och upplevelse av inomhusluftkvalitet. Alla erhållna mätningar indikerade en bra inomhusmiljö i alla klassrum och att alla värden var inom svensk standards rekommendationer. Låg korrelation hittades mellan den uppmätta PVM (predicted mean vote) och AMV (actual mean vote) från frågeformulären även om alla värden var inom gränserna. Dessutom granskar studien metoder som kan tillämpas på liknande framtida studier liksom vilka slags fel som bör undvikas i framtiden. Det finns fortfarande mycket forskning som kan utvecklas för att förstå mer om inomhusmiljön och hur människor uppfattar den.
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Hirashima, Simone Queiróz da Silveira. "Percepção sonora e térmica e avaliação de conforto em espaços urbanos abertos do município de Belo Horizonte - MG, Brasil." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/16/16132/tde-23062015-172738/.
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Em espaços urbanos abertos, particularmente nas grandes cidades de climas tropicais, os pedestres estão expostos não somente a níveis sonoros elevados como também a elevadas cargas térmicas, situação que pode gerar tanto o desconforto acústico quanto o térmico. Entretanto, na maioria das vezes, a relação entre a exposição a condições acústicas e térmicas adversas e a percepção humana dessas condições são estudadas separadamente. Neste trabalho propõe-se, portanto, uma abordagem integrada para a avaliação do conforto acústico e térmico urbano e para o estudo de seus prováveis efeitos combinados. Esta pesquisa foi realizada em Belo Horizonte - MG, Brasil, cidade localizada em região de clima tropical de altitude, com verões quentes e úmidos e invernos frios e secos. Utilizou-se o método indutivo experimental na condução dos trabalhos. Dados acústicos e climáticos foram medidos simultaneamente à aplicação de formulários em dois dias representativos do verão (março/2013) e do inverno (agosto/2013), e em duas praças contrastantes em relação ao seu ambiente acústico e térmico bem como aos seus parâmetros morfológicos como o fator de visão do céu, o altura dos edifícios, o tipo de pavimento, a presença de fontes de água e vegetação. Os índices Nível de Pressão Sonora Equivalente Contínuo, ponderado na curva A (LAeq) e Temperatura Equivalente Fisiológica (PET) foram usados para representar, respectivamente, as condições acústicas e microclimáticas. Foram coletados por meio dos formulários variáveis subjetivas (percepção do volume do ambiente sonoro, avaliação de incômodo relacionado ao ambiente sonoro, avaliação de conforto acústico, percepção de sensações térmicas, preferência de sensações térmicas e avaliação de conforto térmico), variáveis individuais (vestimenta, atividade física, idade, peso, altura, sexo) e dadoscontrole, relacionados aos aspectos psicológicos, sociais e culturais que podem interferir na percepção acústica e térmica do ambiente. A amostra compreendeu aproximadamente 1.700 entrevistados. O tratamento estatístico dos dados coletados abarcou análise descritiva, correlações e regressões. Modelos de regressão logística ordinal foram utilizados para predizer as faixas de percepção acústica e térmica; e modelos de regressão logística, para predizer as faixas de conforto e desconforto acústico e térmico. Os resultados do estudo incluem, dentre outros: 1) a calibração do índice LAeq para percepção do volume sonoro - faixas: \"Baixo\", <35dB(A), \"Normal\", de 36 a 67dB(A), e \"Alto\", >68dB(A); e para avaliação de conforto acústico - faixas: \"Confortável\", <67dB(A), e \"Desconfortável\", >68dB(A); 2) a calibração do índice PET para percepção de sensações térmicas - faixas: \"Frio\", <18,9°C, \"Bem\", de 19 a 27°C, e \"Calor\", >27,1; e para avaliação de conforto térmico - faixas: \"Confortável\", de 23 a 31°C, e \"Desconfortável\", <22,9 e >31,1°C; 3) a definição das temperaturas neutra e preferida para verão (27,7 e 14,9°C) e inverno (15,9°C e 20,9°C), respectivamente, demonstrando a influência da expectativa na avaliação das condições térmicas; e 4) a comprovação de que o aumento do desconforto acústico pode acarretar (ainda que em pequena escala) o aumento do desconforto térmico e vice-versa. Estes resultados podem nortear o esclarecimento de questões referentes à percepção e ao conforto acústico e térmico em espaços urbanos, orientando as políticas públicas em projetos urbanísticos relacionados a esses temas.In urban open public spaces, particularly in big cities of tropical climate, city-users are often exposed not only to high sound levels but also to high thermal loads, a situation that can cause both acoustic and thermal discomfort. Nevertheless, in most cases, the relationship between the exposure to each of these adverse conditions and human perceptions towards each of them are studied separately. In order to address the lack of a combined analysis of these conditions, this research has adopted an integrated approach to evaluate urban acoustic and thermal comfort and their likely combined effects. This study was carried out in in the Brazilian city of Belo Horizonte, in the state of Minas Gerais, a city located in a region of tropical of altitude climate, with hot wet summers and cold dry winters. Acoustic and climatic data were measured simultaneously with the administration of questionnaires in two representative days of summer (March/2013) and winter (August/2013), in two squares that noticeably differ in relation to their acoustic and thermal environment and their morphological parameters such as the sky view factor, the height of the buildings, the type of pavement, the presence of water sources and the vegetation. The LAeq,T and the PET index were used to represent acoustic and microclimatic conditions respectively. Subjective variables (perceived volume of the environmental sound, assessment of annoyance caused by environmental sound, acoustic comfort evaluation, perception of thermal sensation, thermal sensation preference and evaluation of thermal comfort), personal variables (clothing, physical activity, age, weight, height, gender) and control data related to psychological, social and cultural issues that might interfere with acoustic and thermal perception of the environment were collected through the questionnaires. The sample consisted of approximately 1,700 respondents. The statistical treatment of the data collected was comprised of descriptive analysis as well as analysis using correlations and regressions. Ordinal logistic regression models were used to predict the ranges of acoustic and thermal perception and logistic regression models were used to predict the ranges of acoustic and thermal comfort and discomfort. Some of the results of this study are: 1) the calibration of the LAeq index for perceived loudness - ranges: \"Low\", <35dB(A), \"Normal\", between 36 and 67dB(A), and \"High\", >68dB(A); and for evaluation of acoustic comfort - ranges: \"Comfortable\" <67dB(A), and \"Uncomfortable\", >68dB(A); 2) the calibration of the PET index for perceived thermal sensations - ranges, \"Cold\", <18.9°C, \"Well\", 19-27°C, and \"Hot\", >27.1°C; and for evaluation of thermal comfort - ranges: \"Comfortable\", 23-31°C, and \"Uncomfortable\", <22.9 and >31.1°C; 3) the definition of neutral and preferred temperatures for Summer (27.7 and 14.9°C) and Winter (15.9°C and 20.9°C), respectively, showing the influence of expectation on evaluation of thermal conditions; and 4) the confirmation that an increase of the acoustic discomfort may cause (albeit on a small scale) an increase in the thermal discomfort and vice versa. These results might shed light on the issues of acoustic and thermal perception and comfort in urban spaces, helping to guide public policies on urban projects related to these topics.
Books on the topic "Acoustic Comfort"
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Canada Mortgage and Housing Corporation., ed. Qualification of the degree of acoustic comfort provided by multi-family buildings: Phase II. [Ottawa]: CMHC, 2003.
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Fuchs, Helmut V. Applied Acoustics: Concepts, Absorbers, and Silencers for Acoustical Comfort and Noise Control. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-29367-2.
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Fuchs, Helmut V. Applied Acoustics: Concepts, Absorbers, and Silencers for Acoustical Comfort and Noise Control: Alternative Solutions - Innovative Tools - Practical Examples. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.
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Qualification of the degree of acoustic comfort in multi-family buildings. [Ottawa]: CMHC, 1999.
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Reifen – Fahrwerk – Fahrbahn. VDI Verlag, 2022. http://dx.doi.org/10.51202/9783181023983.
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Inhalt Reifenabrieb Einfluss von Reifengröße und Fahrzeuggewicht auf Abriebrate und Laufleistung von PKW- Reifen . . . . . . . .1 Aufbau eines Prüfstands zur Messung von Reifen-Fahrbahn-Feinstaubemissionen auf realen Fahrbahnoberflächen . . . . . 15 Fahrwerksentwicklung Investigation of the damage criticality of axle components of a four-link rear axle on the driving simulator . . . . . . . . . . . .35 Comfort experience with automated driving – How good do chassis systems have to be? . . . .59 Fahrwerkskonzept für große Lastbereiche mit integrierter Hubfunktion. . . . . . . . . . . . . . . .73 Innovative Reifenentwicklung Continuous Estimation of the Local Friction Value Potential based on Tyre Acoustic Data . . . . .83 Untersuchung der Druckverteilung zwischen Reifenwulst und Felgenhorn unter statischen Lastzuständen . . . . . . . . .97 Simulation im Versuch und Entwicklung Hardware-in-the-Loop-Simulation mit erweiterten physikalischen Reifenmodellen zur virtuellen Erprobung von Steuergeräten . . . . . . 117 AUDEx – Automotive development in 1:x – Angewandte Lehre und Forschung m...
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Fuchs, Helmut V. Applied Acoustics : Concepts, Absorbers, and Silencers for Acoustical Comfort and Noise Control: Alternative Solutions - Innovative Tools - Practical Examples. Springer Berlin / Heidelberg, 2015.
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Applied Acoustics Concepts Absorbers And Silencers For Acoustical Comfort And Noise Control Alternative Solutions Innovative Tools Practical Examples. Springer, 2012.
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Fuchs, Helmut V. Applied Acoustics : Concepts, Absorbers, and Silencers for Acoustical Comfort and Noise Control: Alternative Solutions - Innovative Tools - Practical Examples. Springer, 2013.
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Riehl, Mark. TMS stimulator design. Edited by Charles M. Epstein, Eric M. Wassermann, and Ulf Ziemann. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780198568926.013.0003.
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Transcranial magnetic stimulators have progressed from basic implementations to integrated systems optimized for treatment of pathologies. This article reviews key factors of design of such clinically targeted systems, discussing design principles, procedure-specific features, and clinical safety requirements. A power source, a capacitor, and a high-power switch controlled by a processor form the basic stimulator. The fundamental operating mechanism of a TMS stimulator is to create a changing magnetic field that can induce a current in adjacent conductive material. The clinical TMS system must incorporate patient positioning, patient comfort, coil positioning features, and intuitive user controls and means of managing patient data to be a fully effective system. The most important safety risk with repetitive TMS reported in the literature is the risk of inducing seizure. Other safety considerations include proper use of human factor analysis to minimize improper operation, the biocompatibility of materials touching the patient, and addressing acoustic noise.
Book chapters on the topic "Acoustic Comfort"
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Offtermatt, David, Daniel Lust, and Tobias Erhart. "Box-Type Windows as Means for Better Air Quality and Acoustic Comfort in Urban Areas." In iCity. Transformative Research for the Livable, Intelligent, and Sustainable City, 315–34. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92096-8_21.
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AbstractControlled natural ventilation in office buildings can ensure the indoor thermal comfort while reducing the life cycle energy consumption for ventilation, compared to mechanical ventilation systems (e.g. HVAC). Natural ventilation is mostly used in moderate climate zones where air conditioning is not a standard. During intermediate seasons, buildings with HVAC systems can additionally use natural ventilation to reduce energy consumption. However, in dense urban areas, natural ventilation can be problematic in terms of acoustic comfort. Here, a box-type window can serve as a compromise between thermal and acoustic comfort. Due to the more complex handling of the box-type window, an automated (electric driven) novel box-type window approach was developed within the imaF project, a part of the iCity initiative. The following article describes the basics of automated natural ventilation, acoustic characterization as well as architectural integration of this window type and the optimization of the airflow through box-type windows. The results show that the proposed geometry can provide sound insulation while providing an appropriate air exchange rate.
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Bacria, Vasile, Eugen Ghita, and Nicolae Herisanu. "On Acoustic Comfort in Urban Transport on Rails." In Springer Proceedings in Physics, 83–90. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69823-6_10.
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Serra, R., and H. Coch. "A Study Into Climatic, Luminic and Acoustic Comfort in the Architecture." In 1989 2nd European Conference on Architecture, 201–2. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-017-0556-1_59.
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Haselsteiner, Edeltraud, Marielle Ferreira Silva, and Željka Kordej-De Villa. "Climatic, Cultural, Behavioural and Technical Influences on the Indoor Environment Quality and Their Relevance for a." In Future City, 201–14. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71819-0_10.
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AbstractResearch about indoor comfort in future years will increasingly be guided by the pressing need for decarbonizing the built environment due to climate change. Health, efficiency, and satisfaction of work and the feeling of comfort are largely determined by the interior criteria. The sustainable indoor environment is a result of complex factors: air conditioning (ventilation), indoor temperature, heating methods, lighting, and acoustic. This chapter explores and analyzes climatic, cultural, and behavioral factors that play an important role and have an influence on technology for an indoor regenerative environment. This chapter is based on an explorative literature review and reflects indoor environmental quality, users’ expectations, and users’ behavior from the perspective of different scientific disciplines. Current standards are based on a rational approach to thermal comfort, and indicators are determined on the measured subjects’ reactions during stabilized conditions in climatic chambers. It is concluded from these results that people in different environmental conditions react similarly to everyday life. Nevertheless, survey results suggest that achieving the optimal level of the indoor environment is possible when climatic, cultural, and social context is taken into account.
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Haselsteiner, Edeltraud. "Gender Matters! Thermal Comfort and Individual Perception of Indoor Environmental Quality: A Literature Review." In Future City, 169–200. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71819-0_9.
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AbstractThe use of technology in construction has allowed a significant increase in comfort and the construction of energy-efficient buildings. However, for indoor environmental comfort, there is no universal standard that fits all. The indoor climate is perceived individually and the requirements are subjectively shaped. In this paper, a literature review is carried out to describe particular aspects relevant to gender. The aim is to raise awareness of these aspects in order to advance equality orientation as an integral part of planning and energy-efficient building concepts. The findings show that thermal comfort is an essential parameter, and up to 3 °C of differences between women and men were found. This difference is most evident in offices where women show a better cognitive performance in a warmer environment, while men do better in colder temperatures. Gender was also found to be an influencing factor of satisfaction with humidity, acoustic conditions, visual comfort, privacy, air quality, health aspects, light preferences, and brightness perception. Moreover, sick-building syndrome is more common among women. In conclusion, the literature confirms that essential indoor environmental quality (IEQ) parameters vary significantly across men and women and should be taken more into account in the practice of building technology.
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Ipinza, Constanza, Maureen Trebilcock-Kelly, and María Beatriz Piderit-Moreno. "Barriers and Challenges of Acoustic Design in Flexible Learning Spaces for Schools in Chile." In Removing Barriers to Environmental Comfort in the Global South, 295–310. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-24208-3_21.
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Diaz, Muriel, Alex Gonzalez-Caceres, and Shady Attia. "Multicriteria Design: Optimizing Thermal, Acoustic, and Visual Comfort and Indoor Air Quality in Classrooms." In Removing Barriers to Environmental Comfort in the Global South, 435–49. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-24208-3_30.
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Geniola, Viola, Stefania Camplone, Antonio Marano, and Emilio Rossi. "Design of an Innovative Furniture System: Improving Acoustic Comfort in Coworking Workplaces." In Advances in Intelligent Systems and Computing, 835–41. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39512-4_127.
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Aguilar-Aguilera, Antonio J., M. L. De la Hoz-Torres, M. D. Martínez-Aires, and Diego P. Ruiz. "Management of Acoustic Comfort in Learning Spaces Using Building Information Modelling (BIM)." In Occupational and Environmental Safety and Health II, 409–17. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41486-3_44.
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Gutiérrez, Giancarlo, and Laura Marín-Restrepo. "Acoustic Comfort and Noise Control in the Design of Multi-residential Buildings in the Tropics." In Removing Barriers to Environmental Comfort in the Global South, 279–93. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-24208-3_20.
Full textConference papers on the topic "Acoustic Comfort"
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Wang, Junqiang, and Bin Du. "Sound Insulation and Acoustic Comfort Requirements for Noise-Sensitive Buildings." In Conference Proceedings of The 12th International Symposium on Project Management, China, 1726–31. Riverwood, NSW, Australia: Aussino Academic Publishing House (AAPH), 2024. http://dx.doi.org/10.52202/076061-0230.
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Papadakis, Nikolaos M., and Georgios E. Stavroulakis. "Investigation of the Acoustic Comfort of an Academic Library: Case Study at the Technical University of Crete." In 2024 IEEE International Workshop on Metrology for Living Environment (MetroLivEnv), 167–71. IEEE, 2024. http://dx.doi.org/10.1109/metrolivenv60384.2024.10615396.
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Chen, Yong, Sebastian Ghinet, Andrew Price, Viresh Wickramasinghe, and Anant Grewal. "Evaluation of Aircrew Noise Exposure and Hearing Protection Solutions in CH-147F Chinook Helicopter Cabin." In Vertical Flight Society 73rd Annual Forum & Technology Display, 1–11. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12280.
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High noise levels in the helicopter cabin affect aircrew communication and reduce aircrew comfort, and may lead to hearing loss in the long-term if flight helmets cannot provide sufficient protection to the aircrew, or are improperly fitted. A cabin noise exposure survey has been performed on a Royal Canadian Air Force (RCAF) CH-147F Chinook heavy lift helicopter to evaluate the noise environment. The insertion loss performance of the flight helmet was characterized in a reverberant acoustic chamber facility. Investigation results showed that the low frequency noise attenuation provided by the RCAF flight helmet was marginal at high speed flight conditions in which significant cabin noise levels existed in the helicopter cabin. To enhance the low frequency hearing protection performance and clarity in voice communication, in-canal Communication Ear Plugs (CEPs) integrated with active noise cancellation (ANC) capability was investigated. Simulation and proof-of-concept test results demonstrated that the ANC in-canal CEPs can serve as a feasible technical solution to provide enhanced noise attenuation to mitigate the low frequency N/rev tonal noise generated by the aerodynamic pressure from the helicopter rotor blades.
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THOMAS, A., K. BERGMARK, and MR JANSSEN. "ROOM ACOUSTIC COMFORT™ IN HEALTHCARE PREMISES." In Euronoise 2009. Institute of Acoustics, 2023. http://dx.doi.org/10.25144/17289.
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Bormotina, E., Viktor Asminin, and Elena Maklakova. "ANALYSIS OF FACTORS AFFECTING ACOUSTIC COMFORT IN OFFICE SPACES." In SCIENCE AND STUDENTS – 2024, 36–39. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2024. https://doi.org/10.58168/sas_36-39.
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The paper analyzes various factors affecting acoustic comfort in office spaces. Acoustic comfort in the premises is a factor that affects the performance of employees, their concentration and emotional state. This article examines the impact of noise on employees, ways to create acoustic comfort, as well as the classification of office space. The author has made an attempt to scientifically substantiate approaches for creating acoustic comfort.
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Mucchi, Emiliano, Elena Pierro, and Antonio Vecchio. "Experimental Guidelines for NVH Improvements in Helicopter Vibro-Acoustic Comfort." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87383.
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The noise of helicopters has started to become an important issue and the next level technical challenge is to include new design parameters such as vibro-acoustic comfort in the design process of a modern rotorcraft. In this scenario a wide experimental campaign has been performed on a EC-135 helicopter cabin in order to assess the effectiveness of several techniques for NVH (Noise Vibration and Harshness) improvements. Vibro-acoustical modal analyses of the cabin internal and external surface as well as a pure acoustical modal analysis of the cabin enclosure have been performed in order to verify the vibro-acoustical coupling between the cabin cavity and the cabin mechanical structure. Secondly a detailed leakage point detection on the cabin walls has been carried out by a few techniques finding out possible noise sources. Through such experimental analyses, some guidelines are suggested as well as particular techniques/instrumentations in order to improve human comfort on the helicopter cabin.
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Syamsiyah, Nur Rahmawati, Atyanto Dharoko, and Sentagi Sesotya Utami. "Mixed method in acoustic comfort measurement to reveal component of acoustics preservation." In EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5112389.
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Uffreduzzi, F., A. Aquili, E. De Paola, L. G. Stoica, and A. Di Marco. "Beamforming Algorithm for Vehicle Cabin Acoustic Comfort Application." In 10th Convention of the European Acoustics Association Forum Acusticum 2023. Turin, Italy: European Acoustics Association, 2022. http://dx.doi.org/10.61782/fa.2023.1091.
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Guarnaccia, Claudio, Alessandro Ruggiero, Domenico Russo, Matteo Ferro, Salvatore Dello Iacono, and Petr Valášek. "Characterization of green materials for automotive acoustic comfort." In 2023 IEEE International Workshop on Metrology for Automotive (MetroAutomotive). IEEE, 2023. http://dx.doi.org/10.1109/metroautomotive57488.2023.10219100.
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MASIULYTĖ-VITKAUSKĖ, L., EG BOGDANIENĖ, M. LEBEDNYKAITĖ, A. JAGNIATINSKIS, and M. MICKAITIS. "ACOUSTIC COMFORT IN EDUCATIONAL BUILDINGS: LITHUANIAN CASE STUDY." In ICSV24 2017. Institute of Acoustics, 2024. https://doi.org/10.25144/24252.
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