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Dissertations / Theses on the topic 'Coefficient of Sound'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Pinçon, Hervé. "Investigation of a medium with a negative coefficient of nonlinearity." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/18380.

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2

Jenkin, Lance. "Application of cepstral techniques to the automated determination of the sound power absorption coefficient." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/16913.

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Includes bibliographical references.<br>This thesis builds on research by Bolton and Gold, who developed the theory of using cepstral analysis to determine the absorption coefficient of elastic porous materials. Jongens, in his Masters thesis, applied this technique to determine the absorption coefficient of asphalt samples mounted in a sample holder at the end of a tube. Jongens and others identified numerous factors that introduced uncertainties into the measurement. These uncertainties fall into two main categories. The first deals with the influences that the links of the measurement chain

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3

Vissamraju, Krishnasudha. "Measurement of absorption coefficient of road surfaces using impedance tube method." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/master's/VISSAMRAJU_KRISHNASUDHA_59.pdf.

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4

SHTREPI, LOUENA. "Measurement traceability of sound scattering coefficient of diffusive surfaces used in room acoustics and virtual acoustical environments." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2608163.

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The best concert halls take benefit not only from the basic room shape but also from the corrugations of the walls. These diffusive surfaces are responsible for energy mixing, energy extraction from geometrical paths, for filling gaps and increasing reflections density in the impulse response. Hence, performance spaces are characterized by a complex sound field, due to the presence of absorptive and diffusive surfaces. The acoustic properties of these surfaces are characterized based on laboratory standardized measurements. Despite this, no sufficiently satisfactory databases exist. Thus, acou

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5

Onen, Onursal. "Development Of An Effective Single Layer Micro-perforated Sound Absorber." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610064/index.pdf.

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Micro-perforated sound absorbers with sub-millimeter size holes can provide high absorption coefficients. Various types of micro-perforated absorbers are now available in literature for different applications. This thesis presents results of work on the development of an effective single layer micro-perforated sound absorber from the commercial composite material Parabeam with micro diameter holes drilled on one side. Parabeam is used as a structural material made from a fabric woven out of a E-glass yarn and consists of two decklayers bonded together by vertical piles in a sandwich structure

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6

Ducret, Fabrice. "Studies of sound generation and propagation in flow ducts." Licentiate thesis, Stockholm : Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4049.

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7

Aslan, Gokhan. "Cepstral Deconvolution Method For Measurement Of Absorption And Scattering Coefficients Of Materials." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608021/index.pdf.

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Several methods are developed to measure absorption and scattering coefficients of materials. In this study, a new method based on cepstral deconvolution technique is proposed. A reverberation room method standardized recently by ISO (ISO 17497-1) is taken as the reference for measurements. Several measurements were conducted in a physically scaled reverberation room and results are evaluated according to these two methods, namely, the method given in the standard and cepstral deconvolution method. Two methods differ from each other in the estimation of specular parts of room impulse responses

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8

Meng, Han. "Acoustic properties of novel multifunctional sandwich structures and porous absorbing materials." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEC008/document.

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La mise en oeuvre de matériaux acoustiques est une méthode efficace et très utilisée pour réduire le bruit le long de sa propagation. Les propriétés acoustiques de nouvelles structures sandwich multifonctionnelles et de matériaux absorbants poreux sont étudiées dans la thèse. Les principales contributions de la thèse sont les suivantes: Les panneaux sandwich ont généralement d'excellentes propriétés mécaniques et un bon indice de perte en transmission sonore (STL), mais aucune capacité d'absorption acoustique. De nouvelles structures sandwich multifonctionnelles sont développées en intégrant d

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9

Jongens, Adrian Wynand Doride. "Application of cepstrum techniques and a guard tube to the measurement of the normal incident sound power absorption coefficient of road surfaces in-situ." Master's thesis, University of Cape Town, 1993. http://hdl.handle.net/11427/9639.

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Includes bibliographical references.<br>The work described in this thesis was directed towards studying signal processing techniques that could best be incorporated in an apparatus that was to measure the plane wave sound power absorption coefficient of road surfaces in-situ. Road traffic noise has been identified as the greatest noise pollutant in the industrialised world with the tyre/road interaction being the major source of noise for traffic speeds in excess of 50 km/hr. Open pore bitumen asphalt material has been found to present a sound absorbing surface that is able to contribute to th

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10

Джур, Ярослав Володимирович. "Акустична модернізація конференц-залу". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/43159.

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Об’єктом дослідження в даній роботі є методи розрахунку акустичних параметрів конференц-залів. Метою дослідження роботи є проектування та модернізація акустичних умов конференц-залів та захист приміщень від шумів. Актуальність дослідження заключається у високому попиті на багатоцільові зали з хорошими акустичними параметри серед бізнесу та освіти. Методом дослідження є теоретичне проектування залу та покращення його акустичних параметрів за допомогою опрацювання та аналізу літури по архітектурній акустиці. Предметом дослідження є методи та засоби покращення акустичних характеристик приміще

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11

Aydin, Asuman. "Acoustical Characteristics Of Historical Turkish Baths." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610267/index.pdf.

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Comprehensive studies are needed to better understand the original acoustical features of historical baths in order to uncover the historical technologies that enabled the acoustical performance for which they are renowned and to ensure they retain this performance with time. In this study, acoustic performances of Seng&uuml<br>l Hamami and Kadi Hamami, two 15th century historical baths belonging to the Ottoman period, were examined to discover their original acoustical features and to assess their present situation by taking into consideration the recent incompatible repair work. The analyses

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12

Кушніренко, Я. В., Ірина Юріївна Аблєєва, Ирина Юрьевна Аблеева та Iryna Yuriivna Ablieieva. "Поліпшення стану виробничого середовища за шумовими характеристиками". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/63165.

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Виробничий шум на робочих місцях негативно позначається на здатності робітників виконувати свої професійні обов’язки. Загалом людина нормально справляється з простими рутинними завданнями навіть при рівнях шуму у 90–100 дБ, проте вплив шуму вищого рівню викликає порушення у роботі опорно-рухового апарату та зору людини. Щодо виконання складніших завдань, які потребують концентрації та уваги персоналу, шуми з інтенсивністю більше 85 дБ можуть бути причиною виробничого браку, травматизму, виходу з ладу обладнання тощо. Проведення кваліфікованої роботи високої точності та концентрації уваги стає

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13

Tiikoja, Heiki. "Acoustic Characterization of Turbochargers and Pipe Terminations." Licentiate thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92648.

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In search for quieter engines there is a need for a better understanding of the acoustic properties of engine intake and exhaust system components. Besides mufflers which have the purpose of reducing pressure pulses originating from the internal combustion (IC) engine, there are many components in a modern car exhaust and intake system, e.g., air-filters, coolers, catalytic converters, particulate filters - all having an effect on the pressure pulses or sound field in the system. In this work the focus is on the turbocharged IC-engine where both, sound scattering (reflection and transmission)

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14

Лозінський, Владислав Валентинович. "Моделювання звукопровідної системи середнього вуха людини в Comsol". Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/33851.

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Дослідження слухових властивостей слухової системи людини є актуальною проблемою сьогодення, адже здоровий слух це запорука нормального життя. Серед об’єктивних методів, таких як імпендасометрія, дослідження проводять з застосуванням пневмосистеми, що робить неможливим проведення процедури для немовлят. Саме тому запропоновано дослідження на основі ехо-спектрометру, який є вдосконаленим об’єктивного методу без використання пневмосистеми та з простою процедурою вимірювань і обробки для розширення вікової групи та покращенням точності результатів. При наявності великого спектру можливостей для

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15

Chester, Ryan T. "Error Sensor Strategies for Active Noise Control and Active Acoustic Equalization in a Free Field." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2298.pdf.

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16

Khalili, Nasser. "Application of Cepstral techniques to the measurement of reflection coefficients for dispersive systems." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303060.

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17

Tran, Quang Vu. "Locally heterogeneous three-dimensional fibrous media : Representative elementary volumes and calculation of acoustic properties." Electronic Thesis or Diss., Université Gustave Eiffel, 2023. http://www.theses.fr/2023UEFL2081.

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Cette thèse explore les relations complexes entre microstructures, propriétés acoustiques et processus de fabrication des matériaux fibreux non tissés. Elle étudie deux familles de milieux fibreux composites, issues de fibres textiles recyclées (coton, PET), offrant une diversité de polydispersité. Grâce à la caractérisation microstructurale et à l'homogénéisation numérique, ces travaux ont permis d'identifier les paramètres clés associés aux propriétés de transport et d'absorption sonore.Les diamètres moyens pondérés en volume Dv et en volume inverse Div se sont révélés être des descripteurs

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18

Vašek, Lubomír. "Trhání vodního sloupce pod OK vodní turbíny při nestacionárních stavech." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230024.

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In this diploma thesis called Water column separation under the hydraulic turbine runner during unsteady operating regimes are solved the pressure pulsations of the reverse water hamer. In the thesis is deduced a mathematical relationship of elaboration the numerice model which is based on equations of continuity and equations of forces equilibrium. Numerical model is created in MS Excel uses for computation the numerical method Lax-Wendrof that allows consideration of variable sound speed as function of static pressure and allows variable lenght step in computation domain. Reverse water hamme

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19

Guenfoud, Nassardin. "On the multi-scale vibroacoustic behavior of multi-layer core topology systems." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEC010.

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Les panneaux sandwichs en nid d'abeille ont fait l'objet d'intenses recherches ces dernières décennies. En effet, outre leurs bonnes performances mécaniques et leur rapport rigidité poids faible, il en résulte une baisse importante des propriétés acoustiques. Ainsi, de nombreux designs sont régulièrement proposés afin de palier à cette problématique. En parallèle, différents modèles sont développés afin de modéliser des structures de plus en plus complexes, en utilisant notamment les propriétés périodiques dans le but d’étudier la propagation des ondes. Cette dernière permet une étude approfon

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20

Okuyucu, Cigdem. "Semantic Classification And Retrieval System For Environmental Sounds." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615114/index.pdf.

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The growth of multimedia content in recent years motivated the research on audio classification and content retrieval area. In this thesis, a general environmental audio classification and retrieval approach is proposed in which higher level semantic classes (outdoor, nature, meeting and violence) are obtained from lower level acoustic classes (emergency alarm, car horn, gun-shot, explosion, automobile, motorcycle, helicopter, wind, water, rain, applause, crowd and laughter). In order to classify an audio sample into acoustic classes, MPEG-7 audio features, Mel Frequency Cepstral Coefficients

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21

Nascimento, Fábio Pedro do. "Estudo teórico e experimental da velocidade do som em sistemas contendo hidrocarbonetos." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6516.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A descoberta de reservatórios de petróleo na camada do pré-sal abriu novas perspectivas para a economia brasileira. A grandes profundidades, com elevado teor de CO2 e submetidos a altas pressões e temperaturas, a exploração de petróleo das camadas de pré-sal constitui um considerável desafio tecnológico. Neste contexto, o conhecimento dos coeficientes de compressibilidade são fundamentais para o estudo do comportamento termodinâmico e escoamento dos fluidos destes campos de produção. Com este objetivo, foram determinadas experiment

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22

Spa, Carvajal Carlos. "Time-domain numerical methods in room acoustics simulations." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7565.

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L'acústica de sales s'encarrega de l'estudi del comportament de les ones sonores en espais tancats.La informació acústica de qualsevol entorn, coneguda com la resposta impulsional, pot ser expressada en termes del camp acústic com una funció de l'espai i el temps. En general, és impossible obtenir solucions analítiques de funcions resposta en habitacions reals. Per tant, en aquests últims anys, l'ús d'ordinadors per resoldre aquest tipus de problemes ha emergit com una solució adecuada per calcular respostes impulsionals.<br/>En aquesta Tesi hem centrat el nostre anàlisis en els mètodes basat

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23

Hrabina, Martin. "VÝVOJ ALGORITMŮ PRO ROZPOZNÁVÁNÍ VÝSTŘELŮ." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-409087.

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Táto práca sa zaoberá rozpoznávaním výstrelov a pridruženými problémami. Ako prvé je celá vec predstavená a rozdelená na menšie kroky. Ďalej je poskytnutý prehľad zvukových databáz, významné publikácie, akcie a súčasný stav veci spoločne s prehľadom možných aplikácií detekcie výstrelov. Druhá časť pozostáva z porovnávania príznakov pomocou rôznych metrík spoločne s porovnaním ich výkonu pri rozpoznávaní. Nasleduje porovnanie algoritmov rozpoznávania a sú uvedené nové príznaky použiteľné pri rozpoznávaní. Práca vrcholí návrhom dvojstupňového systému na rozpoznávanie výstrelov, monitorujúceho ok

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24

Zaheer, Ruba. "Acoustic source identification in noisy environments." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2024. https://ro.ecu.edu.au/theses/2761.

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Acoustic Source Identification (ASI) has many industrial and environmental applications, and the associated techniques and systems are continually improving in accuracy and efficiency. The detection of acoustic sources in noisy environments has been a topic of interest for researchers and scientists in the past few years. Identifying acoustic sources has been useful in many industrial and military applications, including acoustic ranging, acoustic surveillance and navigation, robot-nature interaction, and hearing aids that visualise sounds. However, it is difficult to identify a sound source w

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25

Sklar, Alexander Gabriel. "Channel Modeling Applied to Robust Automatic Speech Recognition." Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_theses/87.

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In automatic speech recognition systems (ASRs), training is a critical phase to the system?s success. Communication media, either analog (such as analog landline phones) or digital (VoIP) distort the speaker?s speech signal often in very complex ways: linear distortion occurs in all channels, either in the magnitude or phase spectrum. Non-linear but time-invariant distortion will always appear in all real systems. In digital systems we also have network effects which will produce packet losses and delays and repeated packets. Finally, one cannot really assert what path a signal will take, and

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Dušil, Lubomír. "Automatické rozpoznávání logopedických vad v řečovém projevu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218161.

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The thesis is aimed at an analysis and automatic detection of logopaedic defects in speech utterance. Its objective is to facilitate and accelerate the work of logopaedists and to increase percentage of detected logopaedic defects in children of the youngest possible age followed by the most successful treatment. It presents methods of speech work, classification of the defects within individual stages of child development and appropriate words for identification of the speech defects and their subsequent remedy. After that there are analyses of methods of calculating coefficients which reflec

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27

Hofmann, Matthias. "Mainland Canadian English in Newfoundland." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-172221.

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The variety of middle-class speakers in St. John’s conforms to some degree to mainland Canadian-English pronunciation norms, but in complex and distinctive ways (Clarke, 1985, 1991, 2010; D’Arcy, 2005; Hollett, 2006). One as yet unresolved question is whether speakers of this variety participate in the Canadian Shift (cf. Clarke, 2012; Chambers, 2012), a chain shift of the lax front vowels that has been confirmed for many different regions of Canada (e.g. Roeder and Gardner, 2013, for Thunder Bay and Toronto, Sadlier-Brown and Tamminga, 2008, for Halifax and Vancouver). While acoustic phonetic

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28

Ting, Kuo-Shu, and 丁國書. "Sound Absorption Coefficient Design for Wedge and Pyramid Sound Absorption Panels." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/45998491121947303429.

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碩士<br>淡江大學<br>機械工程學系<br>90<br>In this study, the Biot’s poroelastic theory is used to analyze the Complex Dynamics Stiffness (CDS) and acoustical impedance of wedge and pyramid panels. Thereafter the Sound Absorption Coefficient (SAC) of wedge and pyramid panels’ are designed. When a sound absorption material is subjected to an impulse sound pressure, the deformation of the material is appeared. The relationship between the displacement response and an impulse sound pressure loading can be expressed as a CDS. During the study, the poroelastic triangular and rectangular finite elem

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Chang, Chen-Han, and 張珵涵. "Estimation of Sound Velocity and Attenuation Coefficient for Breast Ultrasound Imaging." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/76620374500090944623.

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碩士<br>臺灣大學<br>電機工程學研究所<br>98<br>Recently, breast cancer has been one of the leading causes of death from cancer in females. Therefore, the study of its early detection has become an important issue now. Mammography has always been considered as the most common and the most effective screening method for detecting breast cancer because it can detect non-palpable and small tumors. However, the issue about ionization radiation is disputable. Besides, the images of dense breast region cover the images of small tumor region so that misdiagnosis happens. Toward this drawback, ultrasonic breast imagi

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Kai-HuaLiu and 劉鎧華. "A Research on Sound Absorption Coefficient Prediction Model of Metal Plate Structure." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/58529020102004985878.

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博士<br>國立成功大學<br>建築學系<br>102<br>With changing design techniques, the internal surface of a space is changed, meaning it is not a simple geometrical representation, and the air layer parallel to the wall of structural will change from a regular-shaped air layer into irregular-shaped air layer. According to related literature, the main researched subject factors in a sound-absorbing structure assume the sound-absorbing structure of the surface and backing materials parallel to the wall of the structure, thus, the influence of irregular-shaped air layers and multi air layers are not discussed. The

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Chang, Cheng-Pin, and 張政斌. "Influence of Edge Restraints on the Sound Absorption Coefficient of Porous Materials." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/01042277513365957822.

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碩士<br>淡江大學<br>機械與機電工程學系<br>92<br>The influence of edge restraints on the sound absorption coefficient of porous materials is studied in this thesis. Instead of the use of air for actuating the porous materials, a uniformly distributed impulsive pressure is directly applied on the surface of the porous materials in the study. Through the Laplace domain finite element method, the surface acoustic impedance of porous materials is directly obtained and the sound absorption coefficient is calculated accordingly. The sound absorption characteristics of porous plates with different thick

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Sheng-ChiChen and 陳勝吉. "The Effect of Sound Absorption Coefficient of Interior Panel Construction-A Case Study of Calcium Silicate Board." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/tw23s7.

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碩士<br>國立成功大學<br>建築學系碩士在職專班<br>103<br>Summary In the field of architectural acoustics, there are many types of sound-absorbing materials and constructions that may be summed up in three general categories: 1. Porous Absorbing Materials 2. Helmholtz Resonators 3. Vibrating Panel Absorbers The first two types primarily target sound frequencies of a middle to high range (over 300Hz) and yields a more significant effect. The last type targets sound absorption at a lower sound frequency (under 300Hz). This paper will focus on the investigation of the last category - vibrating panel absorbers. Result

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Hughes, David C., Kirill V. Horoshenkov, L. Lapcik, and M. Vasina. "The acoustical properties of consolidated expanded clay granulates." 2006. http://hdl.handle.net/10454/2434.

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34

Moussa, Karim. "Computational Modeling of Propeller Noise: NASA SR-7A propeller." Thesis, 2014. http://hdl.handle.net/10012/8446.

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The aerospace industry has been concerned with propeller noise levels for years. This interest is two-fold: government regulation and comfort in cabin. This report attempts to create a simulation mechanism needed to evaluate the far-field noise generation levels. However, in order to do that, the tandem cylinder case was evaluated first as a validation step before the SR-7A propeller case was performed. Both cases use STAR-CCM+, a commercial software, to perform the simulations.

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Pinto, Susana Cristina dos Santos. "Development and characterization of multifunctional hybrid structures based on cellular metals." Doctoral thesis, 2020. http://hdl.handle.net/10773/28911.

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The interest in cellular materials has significantly increased in the last two decades, reflecting the growing demand for lightweight and multifunctional structures The high stiffness-to-weight ratio and acoustic and thermal insulation features, make cellular materials attractive for many engineering applications such as civil, automotive, aerospace, amongst others. Open-cell metal foams (OCF) are one of the most promising functional materials characterized by high internal surface area, recyclability and non-flammability, however mechanically weaker. Researchers perceived this topic as

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Lo, Yu-Fa, and 羅煜發. "Optmization of ultrasound bemforming sound velocity using coefficients in bilateral filterig." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6z3gkp.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>In ultrasonic mode (Bmode) imaging, beam imaging usually estimates the position of the object by the concept of time delay, and judges the optimal sound velocity of the image by comparison analysis after imaging. The result is not due to different methods. The same, so we will unify the quantitative analysis, and the method of judging the analysis according to different methods is also different. In the comparison of image diffusion edge sharpness and double-pass filtering edge judgment, the main detection method is to judge the best sound velocity according t

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Lin, Tain-shan, and 林太山. "In-situ measurements of sound absorption and insulation coefficients of noise abatement devices." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11813759822106446842.

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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>100<br>According to the measurement specification of CEN/TS 1793-5,we investigated the accuracy of sound insulation and absorption coefficient in measuring the transport system noise reduction devices and we used to analysis the correlation coefficients from the measured results which contains the measurement signal types, average sampling times, signal to noise ratio, Adrienne time windows adjustment…etc. In the measurement experiment we confirmed that the parameter adjustment for accuracy. For example, we can increase the measurement accuracy effectively by imp

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Bowman, Casady. "Perceiving Emotion in Sounds: Does Timbre Play a Role?" Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10656.

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Acoustic features of sound such as pitch, loudness, perceived duration and timbre have been shown to be related to emotion in regard to sound, demonstrating that an important connection between the perceived emotions and their timbres is lacking. This study investigates the relationship between acoustic features of sound and emotion in regard to timbre. In two experiments we investigated whether particular acoustic components of sound can predict timbre, and particular categories of emotion, and how these attributes are related. Two behavioral experiments related perceived emotion ratings with

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Vengala, Kalyan Chakravarthy. "Building a modified impedance tube for measurement of sound transmission loss and absorption coefficients of polymer cross-linked aerogel core composites." 2009. http://digital.library.okstate.edu/etd/Vengala_okstate_0664M_10589.pdf.

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Hofmann, Matthias. "Mainland Canadian English in Newfoundland: The Canadian Shift in Urban Middle-Class St. John’s." Doctoral thesis, 2014. https://monarch.qucosa.de/id/qucosa%3A20276.

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The variety of middle-class speakers in St. John’s conforms to some degree to mainland Canadian-English pronunciation norms, but in complex and distinctive ways (Clarke, 1985, 1991, 2010; D’Arcy, 2005; Hollett, 2006). One as yet unresolved question is whether speakers of this variety participate in the Canadian Shift (cf. Clarke, 2012; Chambers, 2012), a chain shift of the lax front vowels that has been confirmed for many different regions of Canada (e.g. Roeder and Gardner, 2013, for Thunder Bay and Toronto, Sadlier-Brown and Tamminga, 2008, for Halifax and Vancouver). While acoustic phonetic

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