Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
233,089
result(s) for
"Acoustics"
Sort by:
LXIX Open Seminar on Acoustics Karpacz, Poland, September 25 – 29, 2023 (Chronicle)
On September 25–29, 2023, the LXIX Open Seminar on Acoustics OSA2023 was held in Karpacz. The conference was organized by the Wroclaw Branch of the Polish Acoustical Society (PTA). Simultaneously with the OSA2023 conference two accompanying events were held: Signal Processing Symposium SPSympo23 and 5th Polish-German Structured Conference on Acoustics PGSCA2023. 240 specialists from Poland and abroad took part in the OSA2023, SPSympo23, and PGSCA23 conferences delivering 96 papers and 6 plenary presentations.
Journal Article
Worship sound spaces : architecture, acoustics and anthropology
\"Worship Sound Spaces unites specialists from architecture, acoustic engineering and the social sciences to encourage closer analysis of the sound environments within places of worship. Gathering a wide range of case studies set in Europe, Asia, North America, the Middle East, and Africa, the book presents investigations into Muslim, Christian and Hindu spaces. These diverse cultural contexts demonstrate the composite nature of designing and experiencing places of worship. Beginning with a historical overview of the three primary indicators in acoustic design of religious buildings, reverberation, intelligibility and clarity, the second part of this edited collection offers a series of field studies devoted to perception, before moving onto recent examples of restoration of the sound ambiances of former religious buildings. Written for academics and students interested in architecture, cultural heritage, acoustics, sensory studies and sound\"-- Provided by publisher.
Book
Lateralization in US Caribbean Spanish
This exploratory study examines rhotic production by Caribbean Spanish speakers in the US to empirically investigate (1) claims of categorical employment of the typically variable lateralization rule and (2) whether lateralized rhotics maintain acoustic features that distinguish underlying liquid phonemes. Thirty college-aged Spanish-English bilinguals of Caribbean descent living in the US completed a guided picture description task that elicited specific tokens (n = 48) containing coda /ɾ/ and /l/ in identical phonetic contexts. Coda /ɾ/ productions were coded categorically (in terms of the allophone produced) and acoustically (with measures of duration, formant values at static time points, and formant trajectories). Rates of lateralization were examined, and acoustic characteristics of lateralized rhotics were compared statistically to those of underlying laterals. Results suggest high rates of lateralization of coda /ɾ/ across several speakers, though little evidence of categorical lateralization (i.e., one speaker). Additionally, at the group level, /ɾ/ and /l/ were found to maintain some significant acoustic differences in formant structure at static time points. However, at the individual level, fewer than half of speakers exhibited differences between /ɾ/ and /l/ across 10 acoustic measures. Findings are discussed in light of previous claims of potential phonological and lexical change.
Journal Article
67th Open Seminar on Acoustics September 14 – 17, 2021
The paper contains the abstracts of papers presented during 67th Open Seminar on Acoustics September 14–17, 2021.
Journal Article
Photoacoustic Imaging in Biomedicine and Life Sciences
Photo-acoustic imaging, also known as opto-acoustic imaging, has become a widely popular modality for biomedical applications. This hybrid technique possesses the advantages of high optical contrast and high ultrasonic resolution. Due to the distinct optical absorption properties of tissue compartments and main chromophores, photo-acoustics is able to non-invasively observe structural and functional variations within biological tissues including oxygenation and deoxygenation, blood vessels and spatial melanin distribution. The detection of acoustic waves produced by a pulsed laser source yields a high scaling range, from organ level photo-acoustic tomography to sub-cellular or even molecular imaging. This review discusses significant novel technical solutions utilising photo-acoustics and their applications in the fields of biomedicine and life sciences.
Journal Article
Physics of the piano
Investigates how pianos produce sound and which aspects of the instrument are critical in producing musical tones.
Book
Physics‐based model to predict the acoustic detection distance of terrestrial autonomous recording units over the diel cycle and across seasons: Insights from an Alpine and a Neotropical forest
Passive acoustic monitoring of biodiversity is growing fast, as it offers an alternative to traditional aural point count surveys, with the possibility to deploy long‐term acoustic surveys in large and complex natural environments. However, there is still a clear need to evaluate how the frequency‐ and distance‐dependent attenuation of sound as well as the ambient sound level impact the acoustic detection distance of the soniferous species in natural environments over the diel cycles and across seasons. This is of great importance to avoid pseudoreplication and to provide relevant biodiversity indicators, including species richness, species abundance and species density. To address the issue of detection distance, we tested a field‐based protocol in a Neotropical rainforest (French Guiana, France) and in an Alpine coniferous forest (Jura, France). This standardized and repeatable method consists in a recording session of the ambient sound directly followed by an experiment using a calibrated white noise sound broadcast at different positions along a 100 m linear transect. We then used acoustic laws to reveal the basic physics behind sound propagation attenuation. We demonstrate that habitat attenuation in two different kinds of forests can be modelled by an exponential decay law with a linear dependence on frequency and distance. We also report that habitat attenuation, as first approximation, can be summarized by a single value, the coefficient of attenuation of the habitat. Finally, we show that the detection distance can be predicted knowing the contribution of each attenuation factor, the coefficient of attenuation of the habitat, the ambient sound pressure level and the amplitude and frequency bandwidth characteristics of the transmitted sound. We show that the detection distance mostly depends on the ambient sound and may vary by a factor of up to 5 over the diel cycle and across seasons. These results reinforce the need to take into account the variation of the detection distance when performing passive acoustic surveys and producing reliable biodiversity indicators.
Journal Article