Relevant bibliographies by topics / Environmental Noise

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Environmental Noise'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 May 2025

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Journal articles on the topic "Environmental Noise"

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Zhang, Lu, Mingjiang Wang, Qiquan Zhang, and Ming Liu. "Environmental Attention-Guided Branchy Neural Network for Speech Enhancement." Applied Sciences 10, no. 3 (February 9, 2020): 1167. http://dx.doi.org/10.3390/app10031167.

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The performance of speech enhancement algorithms can be further improved by considering the application scenarios of speech products. In this paper, we propose an attention-based branchy neural network framework by incorporating the prior environmental information for noise reduction. In the whole denoising framework, first, an environment classification network is trained to distinguish the noise type of each noisy speech frame. Guided by this classification network, the denoising network gradually learns respective noise reduction abilities in different branches. Unlike most deep neural network (DNN)-based methods, which learn speech reconstruction capabilities with a common neural structure from all training noises, the proposed branchy model obtains greater performance benefits from the specially trained branches of prior known noise interference types. Experimental results show that the proposed branchy DNN model not only preserved better enhanced speech quality and intelligibility in seen noisy environments, but also obtained good generalization in unseen noisy environments.
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Reuter, Eric. "Environmental noise." Journal of the Acoustical Society of America 150, no. 4 (October 2021): A46. http://dx.doi.org/10.1121/10.0007580.

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Ingrisano, Dennis R.-S., Cecyle K. Perry, and Kairsten R. Jepson. "Environmental Noise." American Journal of Speech-Language Pathology 7, no. 1 (February 1998): 91–96. http://dx.doi.org/10.1044/1058-0360.0701.91.

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The effects of environmental noise were estimated from automatic computer-assisted analyses of voice samples. Signals consisted of a live voice sample and a synthesized triangular waveform. Noise was generated from a personal computer fan. Six different A-weighted signal-to-noise [S/N(A)] conditions were created for the live voice and synthetic signal— 25, 20, 15, 10, 5, and 0 dB. Results revealed that automatic estimates were systematically affected by different S/N levels. As the noise floor increased, baseline estimates of jitter and shimmer also increased in value. Results are discussed with reference to safeguards and standards in voice recording and analysis.
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Cherukuru, Pavani, and Mumtaz Begum Mustafa. "CNN-based noise reduction for multi-channel speech enhancement system with discrete wavelet transform (DWT) preprocessing." PeerJ Computer Science 10 (February 28, 2024): e1901. http://dx.doi.org/10.7717/peerj-cs.1901.

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Speech enhancement algorithms are applied in multiple levels of enhancement to improve the quality of speech signals under noisy environments known as multi-channel speech enhancement (MCSE) systems. Numerous existing algorithms are used to filter noise in speech enhancement systems, which are typically employed as a pre-processor to reduce noise and improve speech quality. They may, however, be limited in performing well under low signal-to-noise ratio (SNR) situations. The speech devices are exposed to all kinds of environmental noises which may go up to a high-level frequency of noises. The objective of this research is to conduct a noise reduction experiment for a multi-channel speech enhancement (MCSE) system in stationary and non-stationary environmental noisy situations with varying speech signal SNR levels. The experiments examined the performance of the existing and the proposed MCSE systems for environmental noises in filtering low to high SNRs environmental noises (−10 dB to 20 dB). The experiments were conducted using the AURORA and LibriSpeech datasets, which consist of different types of environmental noises. The existing MCSE (BAV-MCSE) makes use of beamforming, adaptive noise reduction and voice activity detection algorithms (BAV) to filter the noises from speech signals. The proposed MCSE (DWT-CNN-MCSE) system was developed based on discrete wavelet transform (DWT) preprocessing and convolution neural network (CNN) for denoising the input noisy speech signals to improve the performance accuracy. The performance of the existing BAV-MCSE and the proposed DWT-CNN-MCSE were measured using spectrogram analysis and word recognition rate (WRR). It was identified that the existing BAV-MCSE reported the highest WRR at 93.77% for a high SNR (at 20 dB) and 5.64% on average for a low SNR (at −10 dB) for different noises. The proposed DWT-CNN-MCSE system has proven to perform well at a low SNR with WRR of 70.55% and the highest improvement (64.91% WRR) at −10 dB SNR.
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S. Ashwin, J., and N. Manoharan. "Audio Denoising Based on Short Time Fourier Transform." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (January 1, 2018): 89. http://dx.doi.org/10.11591/ijeecs.v9.i1.pp89-92.

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<p>This paper presents a novel audio de-noising scheme in a given speech signal. The recovery of original from the communication channel without any noise is a difficult task. Many de-noising techniques have been proposed for the removal of noises from a digital signal. In this paper, an audio de-noising technique based on Short Time Fourier Transform (STFT) is implemented. The proposed architecture uses a novel approach to estimate environmental noise from speech adaptively. Here original speech signals are given as input signal. Using AWGN, noises are added to the signal. Then noised signals are de-noised using STFT techniques. Finally Signal to Noise Ratio (SNR), Peak Signal to Noise Ratio (PSNR) values for noised and de-noised signals are obtained.</p>
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Storozhuk, V. M., B. Y. Kshyvetskyy, O. M. Mayevska, H. V. Somar, I. A. Sokolovskyi, and A. V. Melnikov. "Main aspects of environmental protection from urban noise." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 23, no. 96 (December 2, 2021): 88–92. http://dx.doi.org/10.32718/nvlvet-f9615.

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The main sources of noise pollution in modern cities, that generate significant levels of sound pressure, which significantly, sometimes at times exceed permissible noise levels have been identified. The consequences of the negative impact of noise of the urban environment on the human body, fauna and flora are described. The sanitary-hygienic, engineering-technical, architectural-planning, construction-acoustic and economic-social aspects of scientific researches concerning protection of the environment from noise pollution are singled out. The main methods and ways to reduce urban noise are described, among which are: reducing the sound power level of existing equipment and vehicles, or replacing them with less noisy ones, and during design-taking measures to minimize noise emissions from machines; carrying out timely cleaning, adjustment, repair of machines, mechanisms and equipment, restriction or complete prohibition of noisy works and operation of the most intensive noise sources at night; rational orientation of the noise source or place of noise radiation, taking into account the direction indicator; placement of noise sources and objects of protection – at the maximum possible distance from each other; the use of building structures with improved sound insulation, the use of sound-absorbing materials for lining the enclosing structures of buildings and structures; zoning of sources and objects of protection, application of territorial gaps, noise protection buildings, acoustic screens and strips of greenery. It was found that the maximum possible impact on noise pollution of modern cities and surrounding areas can be achieved in the case of integrated application of methods, means of protection against acoustic blocking of the duration, direction and use of noise emissions in its sources and through noise level on the way to its spread, as well as through the implementation of appropriate organizational and technical measures.
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Stojiljković, Milan, and Vlado Delic. "Noise Metric ‐ Environmental Noise Analysis Software." Journal of the Acoustical Society of America 123, no. 5 (May 2008): 3655. http://dx.doi.org/10.1121/1.2934957.

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Shen, Kenan, and Dongbiao Zhao. "An EMD-LSTM Deep Learning Method for Aircraft Hydraulic System Fault Diagnosis under Different Environmental Noises." Aerospace 10, no. 1 (January 5, 2023): 55. http://dx.doi.org/10.3390/aerospace10010055.

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Aircraft hydraulic fault diagnosis is an important technique in aircraft systems, as the hydraulic system is one of the key components of an aircraft. In aircraft hydraulic system fault diagnosis, complex environmental noises will lead to inaccurate results. To address the above problem, hydraulic system fault detection methods should be capable of noise resistance. Previous research has mainly focused on noise-free conditions and many effective approaches have been proposed; however, in real-world aircraft flying conditions, the aircraft hydraulic system often has strong and complex noises. The methods proposed may not have good fault detection results in such a noisy environment. According to the situation, this work focuses on aircraft hydraulic system fault classification under the influence of a hydraulic working environment with Gaussian white noise. In order to eliminate the noise interference and adapt to the actual noisy environment, a new aircraft hydraulic fault diagnostic method based on empirical mode deposition (EMD) and long short-term memory (LSTM) is presented. First, the hydraulic system is constructed by AMESIM. One normal state and five fault states are considered in this paper. Eight-channel signals of different states are collected for network training and testing. Second, the EMD method is used to obtain the different intrinsic mode functions (IMFs) of the signals. Third, principal component analysis (PCA) is used to obtain the main component of the IMFs. Fourth, three different LSTM methods are chosen to compare and the best structure that is chosen is the gate recurrent unit (GRU). After that, the network parameters are optimized. The results under different noise environments are given. Then, a comparison between the EMD-GRU with several different machine learning methods is considered, and the result shows that the method in this paper has a better anti-noise effect. Therefore, the proposed method is demonstrated to have a strong ability of fault diagnosis and classification under the working noises based on the simulation results.
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Passchier-Vermeer, Willy, and Wim Passchier. "Environmental Noise Exposure." Environmental Health Perspectives 106, no. 11 (November 1998): A527. http://dx.doi.org/10.2307/3434244.

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Lizana, Pablo. "Environmental noise culture." Journal of the Acoustical Society of America 128, no. 4 (October 2010): 2422. http://dx.doi.org/10.1121/1.3508647.

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Dissertations / Theses on the topic "Environmental Noise"

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Peng, Dandan, and 彭丹丹. "Compact environmental noise absorber." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/209491.

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With the development of the industry and the society, noise pollution becomes increasingly severe, especially in large cities. Generally, there are three major noise sources, namely industrial noise, traffic noise and community noise. In response, several measurements have been developed to achieve effective noise control. Examples of noise control methods are reduction of noise at source and abatement of noise during the transmission. Since noise sources are more difficult to control, and sometimes already fixed, noise control during sound transmission is more broadly applied. Traditional passive noise control techniques include Helmholtz resonators and noise absorption materials like felt, glass mineral. The sound absorption materials (SAM) are found to be efficient in attenuating noise in high frequency domain, but their performance at low frequencies is quite poor. On the other hand, the Helmholtz resonator works perfect at any target frequency but suffers from its narrow absorption bandwidth, so that it’s only effective within a limited frequency band. As an innovative solution to passive noise control problem, micro-perforated panel absorber (MPPA) has attracted great interest in recent years. It turns out to be a competitive alternative to sound absorption materials and Helmholtz resonator. The parallel and series arrangement of MPPAs backed with cavities of different depths allows them to obtain decent noise absorption performance over a relatively broad frequency range. However, the performance of MPPA is restricted by its volume, as large volume is demanded for decent low-frequency absorption, which is also the case for noise absorption materials. In this thesis, a potential way to improve the low-frequency performance of the MPPA without occupying extra volume is proposed and implemented to tests. The focus is the adjustment of speed of sound and it is beneficial in different applications such as the following. In low frequency noise control, the size of the absorber in at least one dimension is often related to the wavelength and it is often too long. With a reduced speed of sound one can reduce this size while keeping the overall volume constant. Along this line of thinking, the effect of cavity configuration on its acoustic properties is investigated by two steps. Firstly, the property of a waveguide consisting of several identical elements is studied. The number of element is chosen to magnify the effect of the configuration. It turns out the irregularity of the duct shape can slow down the speed of sound of the plane wave by increasing the acoustic mass. Secondly, the absorption performance of an MPPA backed with an irregular cavity is evaluated. The shape of the cavity is the same as the element in the first step. In advance, the parallel arrangement of two MPPAs backed with irregular cavities is investigated, in order to look into the effect of cavity shape on inter-resonator interaction. The final results indicate that cavity design is an effective method to enhance the noise absorption performance of the MPPA arrays in the low-frequency domain.
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Mechanical Engineering
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Master of Philosophy
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Miksis-Olds, Jennifer L. "Manatee response to environmental noise /." View online ; access limited to URI, 2006. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3225323.

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Alberola, Javier. "Predicting variability in environmental noise measurements." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414693.

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Halin, Niklas. "A Shield against Distraction from Environmental Noise." Doctoral thesis, Högskolan i Gävle, Miljöpsykologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22956.

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Working in noisy environments can be detrimental to cognitive performance. In order to perform well people have to find a way to attenuate distraction. This thesis aimed to study the balance between distractibility and task demands in the context of office-related tasks as a means by which to better understand how people in the work environment are influenced by environmental noise. In Report 1, 2 and 3 higher focal-task difficulty was achieved by manipulating the readability of the text that participants were asked to read (i.e. either displaying the text in hard-to-read font or by masking it with static visual noise). The results of Report 1 and Report 2 showed that background speech impaired performance on proofreading and memory for written stories respectively compared to silence, but only when the focaltask difficulty was low, not when it was high. In Report 3 it was shown that background speech, road traffic noise, and aircraft noise impaired performance on text memory compared to silence, but again, only when focal-task difficulty was low. In Report 4 it was tested whether higher cognitive load on the focal task would reduce peripheral processing of a to-be-ignored background story. The results of Report 4 showed that participants in the low-load condition recalled more of the information conveyed in the to-be-ignored background story compared to participants in the high-load condition. It was also investigated whether individual differences in working memory capacity (WMC) would influence participants’ memory for written stories (Report 2) and incidental memory of the to-background story (Report 4) differently depending on task demand. The results showed that individuals scoring high on the WMC-test were less distracted by background speech in the easy-to-read font condition (Report 2), and recalled less of the information in the to-be-ignored background story in the low-cognitive load condition (Report 4) compared to individuals that scored lower on the WMC-test. These relationships were not found in the hard-to-read font condition in Report 2, or in the high-cognitive load condition in Report 4. Taken together, these results indicate that higher focal-task difficulty can shield against the detrimental effect environmental noise on performance on office-related tasks. Moreover, it shows that higher focal-task difficulty can help individuals with low-WMC to reach a level of performance that is similar to that of high-capacity individuals.
Människor som arbetar inom den byggda miljön (t.ex. kontor eller skolor) är ofta exponerade för olika typer av miljöljud (t.ex. bakgrundsprat, vägtrafiks- eller flygplansbuller) som kan ha en negativ inverkan på deras förmåga att prestera på kognitiva uppgifter (t.ex. läs- eller skrivuppgifter). För att kunna prestera behöver de som arbetar inom den byggda miljön hitta ett sätt att minska hur distraherade de blir av bakgrundsbuller när de arbetar med kontorsrelaterade uppgifter (t.ex. korrekturläsning eller minne för text). Syftet med denna avhandling var att studera balansen mellan distraktion och koncentrationskrav på arbetsuppgiften som ett sätt att undersöka vilken inverkan bakgrundsbuller i arbetsmiljön har på människors förmåga att prestera på kontorsrelaterade uppgifter. I Rapport 1, 2 och 3 manipulerades koncentrationskravet på arbetsuppgiften genom att göra texten mer svårläslig (d.v.s. antingen använda ett mer svårläsligt teckensnitt eller genom att maskera texten med ett visuellt brus). Resultaten på Rapport 1 och 2 visade att bakgrundsprat försämrade prestationen på ett korrekturläsningstest och ett textminnestest jämfört med en tyst betingelse, men bara när texten var lättläslig och inte när den var svårläslig. Rapport 3 visade att bakgrundsprat, vägtrafikbuller och flygplansbuller försämrade prestationen på ett textminnestest jämfört med tystnad, men återigen, bara när texten var lättläslig och inte när den var svårläslig. I Rapport 4 undersöktes om ökad kognitiv belastning på en arbetsuppgift skulle minska hur mycket information av ett bakgrundsprat (d.v.s. en berättelse om en fiktiv kultur) som deltagarna kunde återge trots att de blivit instruerade att ignorera det som sades i bakgrunden. Resultatet visade att deltagarna i betingelsen med låg kognitiv belastning kom ihåg mer av informationen från bakgrundsberättelsen jämfört med deltagarna med hög kognitiv belastning. Denna avhandling undersökte också sambandet mellan individuella skillnader i arbetsminneskapacitet och storleken på hur distraherad individen var av bakgrundsprat (Rapport 2), samt sambandet mellan arbetsminneskapacitet och hur mycket individen mindes av det bakgrundsprat de blivit instruerade att ignorera (Rapport 4), och om dessa samband influerades olika beroende på koncentrationskravet på arbetsuppgiften. Resultatet i Rapport 2 visade att individer med hög arbetsminneskapacitet blev mindre distraherade av bakgrundspratet jämfört med individer med låg arbetsminneskapacitet på prosaminnestestet, men bara när texten var lättläslig, inte när den var svårläslig. Rapport 4 visade att i betingelsen med låg kognitiv belastning kom de med hög arbetsminneskapacitet ihåg mindre av bakgrundsberättelsen jämfört med individerna med låg arbetsminneskapacitet, men när den kognitiva belastningen var hög var det ingen skillnad i hur mycket deltagarna kom ihåg av bakgrundsberättelsen mellan individer med hög och låg arbetsminneskapacitet. Sammanfattningsvis visar resultaten att ökat koncentrationskrav på en arbetsuppgift, genom att öka svårighetsgraden (t.ex. genom att använda ett mer svårläsligt teckensnitt), kan skydda mot den negativa inverkan som bakgrundsbuller har på arbetsuppgifter som liknar de människor arbetar med på kontor. Vidare visade resultaten att ökade koncentrationskrav på arbetsuppgiften kan hjälpa individer med låg arbetsminneskapacitet att prestera i paritet med individer med hög arbetsminneskapacitet när arbetsuppgiften utförs i bakgrundsprat.
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Johansson, Marcus. "An indicative case-control study of noise perception due to environmental noise sources." Thesis, KTH, Marcus Wallenberg Laboratoriet MWL, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280546.

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The subject of the thesis was proposed by the acoustic consultancy firm Brekke & Strand, which is of relevance for their additional understanding and development of services and contribution to robust solutions. The aim with this thesis is to give indicative results and to dig deeper into the relation between environmental noise and the perception of the same, specially focusing on construction related noise but also permanent noise sources that originates from infrastructure. The area of interest to evaluate the study is a central location in Stockholm, specifically around Slussen.The importance of a study within this field is vital, especially when considering possible negative health effects that can be related to the perceived noise exposure. With that background it is worth to consider the amount of healthy-life-years lost in Europe each year, which is assumed to be one million. The correlation between lost life years and noise is one of many, but it is also proven to be a catalyst when it comes to stress related or cardiovascular diseases. For instance, if one is living closer than 50 meters from a major road the risk can be four times higher to be annoyed, which in extension can be coupled to the diseases mentioned above.The practical implementation of the study is conducted with a survey and field measurements, with a psychoacoustical perspective and within the frames of a case-control study. Partially this includes to inform the participants of the study at different stages regarding construction noise. The provided information, survey and field measurements aims to be a substantial part of the evaluation regarding the perceived noise whether it is due to construction work, infrastructure or other stochastic sources.The result is presented and distinguished based on distance to noise source, differentiated by gender as well as which type of source that tends to be most annoying. The implemented ranking is displayed as the ICBEN score of each category or source which aims to measure the perceived impact. Even though the results are indicative, the conclusion yields an information dependency as well as a noise source dependency. Further on, the result yields an interesting pattern between genders where women tend to be more disturbed by construction- and other-noise, whereas men tend to be more disturbed by rail- and road-noise.
Ämnet för uppsatsen föreslogs av akustiskkonsultföretaget Brekke & Strand, vilket är av relevans för deras ytterligare förståelse och utveckling av tjänster och bidrag till robusta lösningar. Syftet är att ge vägledande resultat och gräva djupare i förhållandet mellan samhällsbuller och uppfattningen av detsamma, med särskilt fokus på konstruktionsrelaterat buller men också permanenta bullerkällor som härstammar från infrastruktur. Studien och utvärderingen av den samma har fokuserats till Slussenområdet i centrala Stockholm.Betydelsen av en studie inom detta område är avgörande, särskilt när man överväger eventuella negativa hälsoeffekter som kan relateras till den upplevda bullerexponeringen. Med den bakgrunden är det värt att ta hänsyn till hur många hälsosamma levnadsår som går förlorade i Europa varje år, vilket antas vara en miljon. Korrelationen mellan förlorade levnadsår och buller är en av många, men det har också visat sig vara en katalysator när det gäller stressrelaterade eller hjärt- och kärlsjukdomar. Om man till exempel bor närmare än 50 meter från en huvudväg kan risken vara fyra gånger högre för att bli störd och påverkad av buller, vilket i förlängning kan kopplas till ovan nämnda sjukdomar.Det praktiska genomförandet av studien utförsmed en enkätundersökning, fältmätningar,med ett psyko-akustiskt perspektiv och inom ramen för en fallkontrollstudie. Detta inkluderar delvis att informera deltagarna i studien i olika stadier beträffande konstruktionsrelaterat buller. Den tillhandahållna informationen, undersökningen och fältmätningarna syftar till att vara en väsentlig del av utvärderingen av det upplevda bullret oavsett om det beror på byggnadsarbete, infrastruktur eller andra stokastiska källor.Resultatet presenteras och skiljer sig utifrån avstånd till bullerkälla, uppdelat efter kön samt vilken typ av källa som tenderar att vara mest irriterande. Den implementerade rangordningen visas som ICBEN-skalan för varje kategori eller källa, som syftar till att mäta den upplevda effekten. Även om resultaten är vägledande så visar resultaten ett informationsberoende samt ett bullerkällaberoende. Vidare ger resultatet ett intressant mönster mellan könen, där kvinnor tenderar att bli mer störda av konstruktions- och andra-bullerkällor, medan män tenderar att bli mer störda av järnvägs- och väg-buller.
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Wright, Philip. "Extending the scope of unattended environmental noise monitoring." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320714.

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Joynt, Jennifer L. R. "A sustainable approach to environmental noise barrier design." Thesis, University of Sheffield, 2005. http://etheses.whiterose.ac.uk/12880/.

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This thesis recognises the implicit shortfalls in the current methods of noise barrier development. An holistic and integrative methodology was devised, which can be potentially incorporated into general practise, without the unnecessary burdens of excessive cost and environmental impacts. In essence the thesis defines, 'a sustainable approach to environmental noise barrier design'. The importance of sustainability as a key determinant of a noise barrier's success is demonstrated through the impacts of public participation on the acceptance of a noise barrier. This was achieved through the triangulation of a grounded theory, formulated through the qualitative analysis of a real case study and then tested quantitatively on a larger representative sample. The theory explored the impact of ineffective public participation on the perceived success of a noise barrier. Noise maps were developed for the comparison of subjective opinions with objective facts. This also illustrated how this technology can be manipulated to focus public participation, and increase success. Demonstrating the utility of this growing resource beyond its current scope. A methodology for assessing the embodied impacts of noise barrier structures was also devised. By addressing the current lack of availability of a specific model, the means of choosing a noise barrier based on sustainable assets was revealed. Finally, the thesis concluded with a laboratory experiment, which utilised a RAVE facility and revealed the extent to which preconceptions play a role in the perception of a noise barriers' effectiveness. Revealing that regardless of which noise barrier is presented, that preconceptions of a materials' ability to attenuate noise are imbedded. The thesis contributed to several areas through the illustration of a sustainable approach to environmental noise barrier design. The methods highlighted, demonstrate how those responsible for building noise barriers, can improve the acceptance by the public and decrease the environmental impacts associated with the construction of these structures.
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Chandler-Wilde, S. N. "Ground effects in environmental sound propagation." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384241.

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Haikonen, Kalle. "Underwater radiated noise from Point Absorbing Wave Energy Converters : Noise Characteristics and Possible Environmental Effects." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-235016.

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The conversion of wave energy into electrical energy has the potential to become a clean and sustainable form of renewable energy conversion. However, like all forms of energy conversion it will inevitably have an impact on the marine environment, although not in the form of emissions of hazardous substances (gases, oils or chemicals associated with anticorrosion). Possible environmental issues associated with wave energy conversion include electromagnetic fields, alteration of sedimentation and hydrologic regimes and underwater radiated noise. Underwater noise has the potential to propagate over long distances and thus have the potential to disturb marine organisms far away from the noise source. There is great variation in the ability to perceive sound between marine organisms, one sound that is clearly audible to one species can be completely inaudible to another. Thus, to be able to determine potential environmental impact from WECs associated with underwater noise, the noise radiated from the WECs must be known. This thesis presents results from studies on the underwater radiated noise from four different full-scale WECs in the Lysekil Wave Power Project. Hydrophones were used to measure the underwater radiated noise from operating point absorbing linear WECs. The main purpose was to study the radiated noise from the operating WECs with emphasis on characteristics such as spectrum levels, Sound Pressure Level (SPL), noise duration and repetition rate. This to be able to determine the origin of the noise and if possible, implement design changes to minimize radiated noise. The results identified two main operational noises (transients with the bulk of the energy in frequencies <1 kHz). The SPL of the radiated noise fluctuated significantly, depending on wave height. Broadband SPLrms of the measurements ranged between ~110 dB and ~140 dB re 1 µPa and SPLpeak of specific noises ranges between ~140 and ~180 dB re µPa. Audibility was estimated range from 1km to 15 km depending critically on species and on assumptions of propagation loss. The noise is not expected to have any negative effects on behaviour or mask any signals, unless in the vicinity (<150m) of the WECs in significant wave heights. No physical damage, even in close vicinity are expected on either fish or marine mammals. Having the aim to have as little impact on the environment a possible, these studies are important. This way precautions can be implemented early in the technical development of this kind of renewable energy converters. The benefits from the WECs the Lysekil wave power project are believed to outweigh possible environmental impacts due to underwater radiated noise.

Vid avhandlingens tryckläggning upptäcktes inte att tidpunkt för disputation var fel.

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Ibrahim, Hatem Galal Abdel-Azim. "The development of an environmental noise decision support system." Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399063.

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The methodology of noise control exists to solve many noise problems. The most cost effective methods of controlling noise are those that can employed in advance to prevent any potential noise problem occurring. The majority of architects are overlooking to consider any noise problem during the process of the site planning. This is because the existing methods need long procedure to arrive at the required conclusion regarding the noise performance of the site. The existing methods depend of predicting the noise level at the reception point that effected by the noise source. This depends on many variables, including the distance from source; the propagation effects include screening and ground attenuation ...etc. The second stage comes to establish the kind of the building that the receiver will use. At this stage, the noise control expert can establish the required noise performance to solve the problem. Another complicated procedure comes by using the methodology of the noise control, which branches to many options. The chosen option depends on a certain priority and the condition of the architect. On the basis of the above, the thesis concerns with developing another method using the existing techniques, but to use by the architects or the novice users. This method gives the prediction of the noise level at the reception point, establishing the required noise performance and finally gives the suitable advice to solve the problem. The Artificial Intelligence (AI) techniques in general and Expert System (ES) in particular have been employed to develop this method. The most important part in this technique is the knowledge base that will be used to fulfil the desired objective This knowledge has to proceed within many stages, which called knowledge acquisition process. This process consists of 5 main stages, which concerns with identifying the objectives of the system with drawing a relationship between the different factors that effect the desired conclusion. This knowledge should be taken to establish the main concept that will be used to be represented in an expert system. The next stage comes to formalise the collected knowledge followed by the implementation stage and finally the evaluation of the system.
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Books on the topic "Environmental Noise"

1

Brüel & Kjær Sound & Vibration Measurement A/S., ed. Environmental noise. [Denmark]: Brüel & Kjær, 2001.

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Garg, Naveen. Environmental Noise Control. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87828-3.

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Amando, García, ed. Environmental urban noise. Southampton: WIT, 2001.

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Ontario. Ministry of the Environment. Environmental noise for environmental officers. [Toronto, ON: Ministry of the Environment], 1990.

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1930-, Shukla S. K., and Srivastava P. R. 1944-, eds. Environmental noise impact analysis. New Delhi, India: Commonwealth Publishers, 1992.

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Organisation for Economic Co-operation and Development. Ad Hoc Group on Noise Abatement Policies., ed. Fighting noise: Strengthening noise abatement policies. Paris: Organisation for Economic Co-operation and Development, 1986.

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Ontario. Ministry of the Environment. Environmental Approvals and Land Use Planning Branch. Noise Assessment and Systems Support Unit. Introductory environmental noise: Course manual. S.l: s.n, 1988.

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National Research Council (U.S.). Transportation Research Board., ed. Environmental issues: Noise, rail noise, and high-speed rail. Washington, D.C: Transportation Research Board, National Research Council, 1987.

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Feather, Timothy D. Reducing environmental noise impacts: A USAREUR noise management program handbook. Ft. Belvoir, Va: U.S. Army Corps of Engineers, Water Resources Center, Institute for Water Resources, 1991.

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Ontario. Ministry of the Environment. Manual for environmental noise: Certificate course. [Toronto: Ministry of the Environment], 1997.

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Book chapters on the topic "Environmental Noise"

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Rumberg, Martin. "Environmental Noise." In X.media.publishing, 127–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88203-9_8.

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Shahidan, Shahiron, and Nurul Izzati Raihan Ramzi Hannan. "Environmental Noise." In Acoustic And Non-Acoustic Performance Coal Bottom Ash Concrete, 15–24. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7463-4_3.

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Verma, Subhash, Varinder S. Kanwar, and Siby John. "Noise Pollution." In Environmental Engineering, 523–32. New York: CRC Press, 2022. http://dx.doi.org/10.1201/9781003231264-37.

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McMullan, R. "Noise." In Environmental Science in Building, 189–213. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-22169-1_10.

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McMullan, R. "Noise." In Environmental Science in Building, 162–82. London: Macmillan Education UK, 1989. http://dx.doi.org/10.1007/978-1-349-19896-2_10.

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McMullan, Randall. "Noise." In Environmental Science in Building, 195–220. London: Macmillan Education UK, 1998. http://dx.doi.org/10.1007/978-1-349-14811-0_10.

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Deveaux, Tim. "Noise." In Bassett’s Environmental Health Procedures, 135–56. Ninth edition. | Abingdon, Oxon; New York, NY : Routledge, [2020]: Routledge, 2019. http://dx.doi.org/10.1201/9780429060847-7.

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Gokhale, Sharad. "Environmental Noise Pollution." In Handbook of Environmental Engineering, 565–82. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119304418.ch18.

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Can, Arnaud. "Noise Pollution Indicators." In Environmental Indicators, 501–13. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9499-2_30.

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Smith, Clare. "Sound and noise." In Environmental Physics, 220–40. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003419457-7.

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Conference papers on the topic "Environmental Noise"

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BLONDEL, PH, G. JIMENEZ, and R. WYATT. "SEISMIC SURVEYS IN COMPLEX ENVIRONMENTS: EFFECTS OF ENVIRONMENTAL VARIABILITY ON SOUND PROPAGATION AND MITIGATION PRACTICE." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19887.

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WOOD, CM. "PLANNING, ENVIRONMENTAL ASSESSMENT AND NOISE." In Planning and Noise 1989. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/21634.

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ARMANI, A., and B. ABRAMI. "FOUR DIMENSION ENVIRONMENTAL NOISE ANALYSIS (4-DENA)." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19256.

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KUNO, K., M. OMIYA, Y. MISHINA, Y. OISHI, and A. HAYASHI. "MEASUREMENTS AND RATINGS OF ENVIRONMENTAL NOISE IN JAPAN." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19564.

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SHIBAYAMA, H., and S. NAKAMURA. "COMPLICATION APPRAISED BY WAVE FORM OF ENVIRONMENTAL NOISE." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19454.

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BISTAFA, SR. "ENVIRONMENTAL NOISE IMPACT ANALYSIS FROM VEHICLE INSPECTION STATIONS." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19836.

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ELSON, D. "THE ENVIRONMENTAL ENGINEERING HIGH INTENSITY ACOUSTIC FACILITY." In High Intensity Noise 1990. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/21502.

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Vilniškis, Tomas, and Tomas Januševicius. "Research of Different Noise Barriers Efficiency at Different Temperature." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.061.

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In this article was analyzed acoustic efficiency of two different construction noise barriers. Field measurements of noise tests were carried out before and behind a wooden barrier, which height was 2.9 meters and a wooden wall with equipped roof, which height was 3.2 m. As is known the length of the wall, height, surface roughness, shape and material of the wall – key aspects of determining the effectiveness of noise barrier. Different materials, depending on their characteristics of the hard or soft, porous or dense, interact differently with the sound of waves. Article contains research results of noise measurements at positive and negative air temperature. There analyzing wooden noise barrier acoustic efficiency at different temperatures and the effects of temperature to the diffraction of sound waves through the peak of the barrier. Test results show, that noise barrier without structural changes reduced noise level to 14–22 dB, noise barrier with structural changes reduced noise level to 20–23,1 dB, when air temperature was positive. When air temperature was negative, noise barrier without structural changes reduced noise level to 15,5–21,4 dB, noise level with structural changes to 19–26,6 dB.
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EDWARDS, JW. "SURVEY OF ENVIRONMENTAL NOISE AND VIBRATION FROM LONDON UNDERGROUND TRAINS." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19549.

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DICKINSON, PJ. "TOWARDS THE USE OF SOUND EXPOSURE IN ENVIRONMENTAL NOISE STANDARDS." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19728.

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Reports on the topic "Environmental Noise"

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Truong, Vuong, James Chafouleas, Thomas Mosdal, Sophia Bragdon, Megan Bishop, and Jay Clausen. Thermography conversion for optimal noise reduction. Engineer Research and Development Center (U.S.), September 2024. http://dx.doi.org/10.21079/11681/49414.

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Computer vision applications in terms of raw thermal radiance are limited by byte size. Normalizing the raw imagery reduces functional complexities that could otherwise aide a computer processing algorithm. This work explores a method to normalize 16-bit signed integer (I16) into unsigned 8-bit (U8) while maintaining the integrity of the correlation coefficients between the raw data sets and the environmental parameters that affects thermal anomaly detectability.
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Jebrail, F. F., and R. S. Kistler. L51753 Natural Draft Aerial Coolers. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 1996. http://dx.doi.org/10.55274/r0010422.

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In recent years, environmental regulations have tightened and community involvement in environmental issues has increased. The pipeline industry has responded by attempting to reduce the negative economic and environmental impact of conventional air-cooled heat exchangers, which are characterized by high noise levels, excessive energy consumption, and high maintenance costs. While industry has had limited success in reducing air cooler noise using silencers and timed variable-speed fans, these solutions are costly. The most effective noise reduction method is to reduce or eliminate noise at its source. The primary goals of this investigation were to address key technical issues and to document natural draft aerial cooler (NDAC) design knowledge. The following objectives were identified: - Form a project team from PRCI-recommended aerial cooler manufacturers to design a quiet aerial cooler - Conduct technical and economic analyses to determine the actual operating needs and constraints of NDACs - Conduct market analyses to evaluate and identify the marketing issues associated with NDACs - Document the results of the project in a final report In recent years, the number of environmental permits mandating the use of natural draft aerial coolers to reduce noise has increased. Natural draft aerial cooler technology can potentially eliminate noise and improve operational energy efficiency. A broad group of applications could benefit from this technology, including natural gas, engine jacket water, auxiliary water, and engine lube oil cooling. With noise regulations and penalties becoming increasingly stringent, natural draft heat transfer technology is becoming more important. No organization has as yet fully investigated it. The technical and economic feasibility of NDACs were investigated for natural gas, engine jacket water, auxiliary water, and lube oil cooler applications.
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Slone, Scott, Marissa Torres, Alexander Stott, Ethan Thomas, and Robert Ibey. CRREL Environmental Wind Tunnel upgrades and the Snowstorm Library. Engineer Research and Development Center (U.S.), January 2024. http://dx.doi.org/10.21079/11681/48077.

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Environmental wind tunnels are ideal for basic research and applied physical modeling of atmospheric conditions and turbulent wind flow. The Cold Regions Research and Engineering Laboratory's own Environmental Wind Tunnel (EWT)—an open-circuit suction wind tunnel—has been historically used for snowdrift modeling. Recently the EWT has gone through several upgrades, namely the three-axis chassis motors, variable frequency drive, and probe and data acquisition systems. The upgraded wind tunnel was used to simulate various snowstorm conditions to produce a library of images for training machine learning models. Various objects and backgrounds were tested in snowy test conditions and no-snow control conditions, producing a total of 1.4 million training images. This training library can lead to improved machine learning models for image-cleanup and noise-reduction purposes for Army operations in snowy environments.
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Lombardi, D. A., T. J. Blasing, C. E. Easterly, R. M. Reed, and C. B. Hamilton. Environmental resources of selected areas of Hawaii: Climate, ambient air quality, and noise. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/90251.

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Sanchez, Audrey Anna, and Charles Dean Hathcock. Noise Study for the Mexican Spotted Owl Sandia-Mortandad Area of Environmental Interest. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1511180.

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Sanchez, Audrey Anna, and Charles Dean Hathcock. Noise Study for the Mexican Spotted Owl Sandia-Mortandad Area of Environmental Interest. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1511189.

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Lombardi, D. A., T. J. Blasing, C. E. Easterly, and C. B. Hamilton. Environmental Resources of Selected Areas of Hawaii: Climate, Ambient Air Quality, and Noise (DRAFT). Office of Scientific and Technical Information (OSTI), June 1994. http://dx.doi.org/10.2172/882444.

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Jengo, Eunice, Salome Maro, and Björn Haßler. Leveraging IOT Systems to Assess and Reduce the Impact of Climate Change in Learning Environments. Open Development & Education, May 2025. https://doi.org/10.53832/opendeved.1185.

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Learning environments in low- and middle-income countries are increasingly impacted by climate change, facing challenges such as extreme heat, poor air quality, and noise pollution. However, there is limited research that comprehensively assesses these conditions across diverse climatic zones. This study addresses that gap by designing and piloting a low-cost, energy-efficient, solar-powered IoT system to monitor environmental conditions in schools. Using a mixed-methods, multi-phase research design, the study deploys sensor networks in Tanzanian classrooms—including retrofitted and control spaces—to collect real-time data on temperature, humidity, air quality, and noise levels. Data is transmitted via LoRa to an IoT gateway and then to the cloud using mobile connectivity. The pilot aims to inform decisions on classroom design, scheduling, and retrofitting to mitigate climate-related stress. With plans to scale across other regions and countries, this initiative supports evidence-based interventions for creating more resilient and conducive learning environments in resource-constrained settings.
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Sparrow, Victor W. Determination of Aircraft Sonic Boom Noise Penetration into Seas, Bays, and Lakes for Environmental Assessment. Fort Belvoir, VA: Defense Technical Information Center, February 1998. http://dx.doi.org/10.21236/ada379672.

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Schipani, Salvatore P., Richard S. Bruno, Michael A. Lattin, Bobby M. King, and Debra J. Patton. Quantification of Cognitive Process Degradation While Mobile, Attributable to the Environmental Stressors Endurance, Vibration, and Noise. Fort Belvoir, VA: Defense Technical Information Center, April 1998. http://dx.doi.org/10.21236/ada346416.

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