Canadian Acoustics https://jcaa.caa-aca.ca/index.php/jcaa <p>This quarterly journal is free to individual members of the Canadian Acoustical Association (CAA) and institutional subscribers. <strong>Canadian Acoustics</strong> publishes refereed articles and news items on all aspects of acoustics and vibration. It also includes information on research, reviews, news, employment, new products, activities, discussions, etc. Papers reporting new results and applications, as well as review or tutorial papers and shorter research notes are welcomed, in English or in French.</p> en-US <p>Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future) <br>i)&nbsp;&nbsp; &nbsp;to publish, reproduce, distribute, display and store the Contribution;<br>ii)&nbsp;&nbsp; &nbsp;to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;<br>iii)&nbsp;&nbsp; &nbsp;to exploit all subsidiary rights in the Contribution,<br>iv)&nbsp;&nbsp; &nbsp;to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;<br>v)&nbsp;&nbsp; &nbsp;to licence any third party to do any or all of the above.<br><br></p> editor@caa-aca.ca (Prof. Umberto Berardi) Sat, 27 Jun 2020 17:54:50 +0000 OJS 3.2.0.3 http://blogs.law.harvard.edu/tech/rss 60 Neighbourhood Context and Composition Moderate the Noise Annoyance Dose-Response https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3371 <p>Growing urban populations, conflicting land uses, and more traffic are exaggerating noise pollution in urban areas. Toronto is one of the cities facing challenges in tackling environmental noise. The significance of this research is based on a relative absence of literature on how noise sensitivity and annoyance are affected by non-acoustic factors, such as the built environment, demographic, and socio-economic factors. Data from a neighbourhood noise survey (n=552) in 2017 was combined with spatial data on the built environment and predicted noise exposures. Bivariate analysis and multivariate regression showed that socioeconomic and physical environment factors influence the noise annoyance responses.&nbsp; Specifically, residents in a neighborhood with high socioeconomic status and access to green space, and low night time noise levels, were more than twice as likely (Odds Ratio:2.35; p&lt;0.001) to report high annoyance when evaluating the neighbourhood soundscape relative to residents of neighbourhoods with moderate socio-economic status and lower access to green space. Although nighttime noise levels appeared to be a strong predictor of neighbourhood differences in noise annoyance at home and in the neighbourhood, the findings demonstrate that noise perceptions are determined in part by neighbourhood contexts such as environmental quality and individual characteristics. For future research on noise perception the results warrant explicit consideration of shared neighbourhood perceptions of noise and environmental expectations.</p> Tor H. Oiamo, Desislava Stefanova Copyright (c) 2020 Tor H. Oiamo https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3371 Tue, 17 Mar 2020 00:00:00 +0000 Minutes of the 2020 CAA Board of Directors Meeting https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3394 Roberto Racca Copyright (c) 2020 Umberto Berardi https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3394 Mon, 22 Jun 2020 00:00:00 +0000 Acoustic Week in Canada 2021 Sherbrooke Conference Announcement https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3392 <p class="p1"><span class="s1">Acoustics Week in Canada 2021 will be held on October 6-8, in Sherbrooke, Québec.</span></p> <p class="p1"><span class="s1">&nbsp;You are invited to be part of this three-day conference featuring the latest developments in Canadian acoustics and vibration. Sherbrooke is well known in acoustics for the Groupe d’Acoustique de l’Université de Sherbrooke (GAUS) founded in 1984.</span></p> <p class="p1"><span class="s1">The conference will be an excellent opportunity to visit or rediscover the GAUS during the International Year of Sound!</span></p> Olivier Robin Copyright (c) 2020 Olivier Robin https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3392 Wed, 17 Jun 2020 00:00:00 +0000 The Sound of a Monumental Architecture https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3376 <p>The present work is intended to be a scientific commentary on the ``''SynAsTex Korrektur'' sound performance by the German artist Florian Hecker. The choice of the venue for the performance fell on the rationalist atrium of the School of Engineering of the University of Bologna, which is part of a historical building dating back to the 1930s. The study tries to answer some questions. Which role can be played by the acoustics of a monumental atrium - which is made by marble and reflective surfaces - in an electronic performance? How much may the presence of the standing audience influence the room acoustics? Which are the peculiarities of the sound energy distribution in this kind of strongly non-diffuse sound field? The assessment of the acoustic condition was carried out through acoustic simulations, employing a ray-based approach.</p> Giulia Fratoni Copyright (c) 2020 Giulia Fratoni https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3376 Mon, 11 May 2020 00:00:00 +0000 The quite world of COVID-19: a lesson for our listening https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3393 Umberto Berardi Copyright (c) 2020 Umberto Berardi https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3393 Thu, 18 Jun 2020 00:00:00 +0000 First Steps Towards a Methodology to Assess the Influence of Noise on a Natural Area https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3372 <p>Natural sounds are integral elements of the natural environment that are frequently associated with natural parks and similar areas. They are, indisputably, inherent components of landscapes and their contents of natural and historical features, and particularly of their wildlife. Natural sounds constitute an indicator of the health of the wildlife habitat and the diverse ecosystems that comprise such areas. The present generation has an acknowledged obligation to conserve these natural resources for the benefit of those to come.</p> <p>In the process of planning to achieve the objectives of acoustic quality of the natural soundscape, the fundamental principle for determining the health of the natural environment, which forms part of the general planning of the natural parks, is the preservation of the soundscape at levels compatible with the characteristics of the park. When deficiencies are identified, action needs to be taken to restore the soundscape to its natural condition. The objective of this project is to analyse the existence of “non-natural” noises foreign to the natural environment and protect the Natural Soundscape from intrusive acoustic impacts. The study was carried out on the "natural area" of Anceu, located in the municipality of Pontecaldelas in the province of Pontevedra, Galicia (Spain).</p> Ricardo Hernández-Molina, Francisco Fernádez-Zacarías, David Bienvenido-Huertas, José Luis Cueto-Ancela Copyright (c) 2020 Ricardo Hernández-Molina, Francisco Fernádez-Zacarías, David Bienvenido-Huertas, José Luis Cueto-Ancela https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3372 Mon, 11 May 2020 00:00:00 +0000 Numerical and Experimental Study of Various Interior Source Identification Methods With Circular Microphone Array https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3370 <p>This study addresses an assessment of some sound identification methods using circular microphone arrays for sources interior to the array circle. Various techniques are compared, including classical beamforming (CB), regularized inverse methods (Tikhonov regularization), L1- generalized inverse beamforming (L1-GIB), deconvolution methods CLEAN-PSF, CLEAN-SC, as well as more recent inverse methods using beamforming regularization (BFR). To highlight the advantages and disadvantages of these methods, several numerical and experimental application examples are discussed. When multiple sources are searched, the results show that the method of choice depends on the correlation, directivity and relative level of the sources.</p> Iman Khatami, Alain Berry Copyright (c) 2020 iman khatami, Alain Berry https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3370 Mon, 15 Jun 2020 00:00:00 +0000 The MEANU : University-of-Alberta Acoustical Laboratory https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3379 <p>The MEANU is an acoustical Laboratory under the University of Alberta that provides capability for commercial testing of products and assemblies commonly used in construction in Canada and for possible research.&nbsp;</p> <p>&nbsp;</p> Corjan Buma Copyright (c) 2020 Corjan Buma https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3379 Wed, 20 May 2020 00:00:00 +0000