Zobrazeno 1 - 10
of 18
pro vyhledávání: '"André L'Espérance"'
Publikováno v:
Applied Acoustics. 59:323-335
In the particular case of multichannel control, the acoustic power limit of loudspeakers may be an important restriction for active control application when the noise levels are very high. The goal of this paper is to present the different parameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c78672d39678aa57c4af7f3b51b19176
https://doi.org/10.1016/s0003-682x(99)00034-1
https://doi.org/10.1016/s0003-682x(99)00034-1
Publikováno v:
Applied Acoustics. 57:357-374
Active Noise Control (ANC) of higher order modes in a circular duct is studied. To overcome the limitations of a modal approach to locate the error sensors, an alternative strategy, referred to as the error sensor plane concept, is proposed. The basi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3dfa80f39bc8a53125a061c8166a2625
https://doi.org/10.1016/s0003-682x(98)00060-7
https://doi.org/10.1016/s0003-682x(98)00060-7
Publikováno v:
Proceedings of Meetings on Acoustics.
Active Noise Control (ANC) has been studied in the 90s as an innovative way to reduce the noise in specific situations. Some applications are well known today and found commercial success such as noise-cancelling headphones. However, the use of ANC i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b393924c29375ef988e0d676a120f2d6
https://doi.org/10.1121/1.4799926
https://doi.org/10.1121/1.4799926
Publikováno v:
The Journal of the Acoustical Society of America. 93:3105-3116
The Gaussian beam approach solves the wave equation in the neighborhood of the conventional rays using the parabolic approximation. The solution associates with each ray a beam having a Gaussian amplitude profile normal to the ray. The approximate ov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::594b33b71001564fb74ab5b32d944062
https://doi.org/10.1121/1.405722
https://doi.org/10.1121/1.405722
Autor:
Yannick Gabillet, Dennis W. Thomson, André L'Espérance, D.K. Wilson, Gilles A. Daigle, Jean Nicolas
Publikováno v:
Applied Acoustics. 40:325-346
This paper presents a set of acoustical and meteorological data from an outdoor sound propagation experiment. This experiment was done in a farm field near Rock Springs, Pennsylvania, on 7 July 1990. Meteorological and acoustical measurements were re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89e2147e2453ea05fbd8bfc8aa9d9fdb
https://doi.org/10.1016/0003-682x(93)90092-k
https://doi.org/10.1016/0003-682x(93)90092-k
Publikováno v:
Journal of the Acoustical Society of Japan (E). 14:251-258
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7dd498aa4f099f2dd20b5e8db38647b
https://doi.org/10.1250/ast.14.251
https://doi.org/10.1250/ast.14.251
Publikováno v:
Applied Acoustics. 37:111-139
In the case of outdoor sound propagation at relatively short ranges, it is reasonable to assume that sound follows straight ray paths. At longer ranges, refraction due to temperature and wind gradients results in ray paths that are curved, and calcul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ef510cba69ec64480f8aef2d0570a7e
https://doi.org/10.1016/0003-682x(92)90022-k
https://doi.org/10.1016/0003-682x(92)90022-k
Results of experimental measurements of sound propagating over the range from 16 to 250 m at frequencies between 160 and 2000 Hz in a refracting atmosphere are described. Wind velocity and temperature are also measured simultaneously with the acousti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fb1ef5860cb207851af4378762b855a
https://nrc-publications.canada.ca/eng/view/object/?id=1feda06a-daf0-4df9-95cb-c79110943703
https://nrc-publications.canada.ca/eng/view/object/?id=1feda06a-daf0-4df9-95cb-c79110943703
Autor:
P. Naz, Yannick Gabillet, Henry E. Bass, A. Güdesen, André L'Espérance, John M. Noble, H.A.J.M. van Hoof, G. R. Becker, Shahram Taherzadeh, Y. L. Li, Kenneth E. Gilbert, Xiao Di, Gilles A. Daigle, Keith Attenborough, A. Chrestman, Michael J. White, Richard Raspet
Publikováno v:
Journal of the Acoustical Society of America, 1, 97, 173-191
The computational tools available for prediction of sound propagation through the atmosphere have increased dramatically during the past decade. The numerical techniques include analytical solutions for selected index of refraction profiles, ray trac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b47e88abfa27bcd6042bbc8dbf7e216
http://resolver.tudelft.nl/uuid:aa12dd89-a86d-4cab-a63d-1c5665603428
http://resolver.tudelft.nl/uuid:aa12dd89-a86d-4cab-a63d-1c5665603428
The heuristic model of sound propagation in the atmosphere has been developed by L’Esperance et al. [Appl. Acoust. 37, 111–139 (1992)] to provide rapid calculation of sound‐pressure levels. This model uses an analytic ray trace method to calcul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f42374fa3aaeca76ade1752717147ba
https://doi.org/10.1121/1.412333
https://doi.org/10.1121/1.412333