Zobrazeno 1 - 10
of 74
pro vyhledávání: '"B. Edward McDonald"'
Autor:
Andrew A. Piacsek, B. Edward McDonald
Publikováno v:
The Journal of the Acoustical Society of America. 130:2648-2653
The nonlinear progressive wave equation (NPE) [McDonald and Kuperman, J. Acoust. Soc. Am. 81, 1406-1417 (1987)] is expressed in a form to accommodate changes in the ambient atmospheric density, pressure, and sound speed as the time-stepping computati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::323927b7099af7743910d5892348b9a1
https://doi.org/10.1121/1.3641403
https://doi.org/10.1121/1.3641403
Autor:
B. Edward McDonald
Publikováno v:
Journal of Computational Acoustics. 17:357-364
Attenuation which is linear in frequency (as opposed to quadratic as for laminar viscosity) occurs in porous media wave propagation and biomedical applications. Straightforward use of Fourier transforms for frequency-linear attenuation violates causa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11b34f7ff32370fa3fc4595f1b539b59
https://doi.org/10.1142/s0218396x09003987
https://doi.org/10.1142/s0218396x09003987
Autor:
B. Edward McDonald
Publikováno v:
The Journal of the Acoustical Society of America. 120:3503-3508
The nonlinear progressive wave equation [McDonald and Kuperman, J. Acoust. Soc. Am. 81, 1406–1417 (1987)] is expressed in a form to accommodate Hertzian nonlinearity of order n=3∕2 typical of granular media. Stability of self-similar plane weak s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1124966d80dacf0653007e5e02908ae
https://doi.org/10.1121/1.2363946
https://doi.org/10.1121/1.2363946
Publikováno v:
The Journal of the Acoustical Society of America. 114:1851-1860
Perturbation theory for ocean acoustic modal group speed responses to small environmental changes is investigated with regard to its applicability to ocean acoustic tomography. Assuming adiabaticity, the inverse problem for each vertical eigenmode is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c056bc864d89320aeceee2c7a768bdf
https://doi.org/10.1121/1.1605953
https://doi.org/10.1121/1.1605953
Autor:
B. Edward McDonald
Publikováno v:
Wave Motion. 31:165-171
The nonlinear progressive-wave equation (NPE) model has been reformulated for wider propagation angle accuracy. The wide angle NPE results from range-integrating the second order time domain nonlinear wave equation rather than reducing it to a first
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0cb3bfe91ad0a9e1e9aa0a91b5c5bd3
https://doi.org/10.1016/s0165-2125(99)00044-x
https://doi.org/10.1016/s0165-2125(99)00044-x
Publikováno v:
Wave Motion. 31:131-138
An adiabatic mode solution is derived for azimuthally advected gravity waves. Horizontal variations in the medium are assumed to be sufficiently gradual so that the coupling of energy between modes can be neglected. The wind speed is assumed to be sm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a52574eee53436b6cdc3fee32b1e36c1
https://doi.org/10.1016/s0165-2125(99)00040-2
https://doi.org/10.1016/s0165-2125(99)00040-2
Autor:
B. Edward McDonald, David C. Calvo
Publikováno v:
The Journal of the Acoustical Society of America. 122:3159-3161
Excitation of acoustic radiation into the air from a low-frequency point source under water is investigated using plane wave expansion of the source spectrum and Rayleigh reflection/transmission coefficients. Expressions are derived for the acoustic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd33503e17c4a6da95b3e4c90c5bc880
https://doi.org/10.1121/1.2793709
https://doi.org/10.1121/1.2793709
Publikováno v:
The Journal of the Acoustical Society of America. 104:1356-1362
A hybrid treatment for wide-angle paraxial propagation that includes effects of both sediment dispersion and weak nonlinearity has been developed. A Fourier transform approach is used to combine effects of refraction, diffraction, and sediment disper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93da5665edb0abf2e0864eccdc09e5d0
https://doi.org/10.1121/1.424344
https://doi.org/10.1121/1.424344
Publikováno v:
The Journal of the Acoustical Society of America. 102:2487-2493
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9e003181ab981e8d360dca675f2b7e3
https://doi.org/10.1121/1.420303
https://doi.org/10.1121/1.420303
Autor:
B. Edward McDonald
Publikováno v:
The Journal of the Acoustical Society of America. 100:219-224
Ocean acoustic mode coupling matrix elements are investigated assuming weak range dependence in both the sound‐speed profile and bathymetry. The range‐dependent environmental variables are taken as known, and explicit integral expressions for the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abe3933977126d5ef7ad0b2f526baa9e
https://doi.org/10.1121/1.415951
https://doi.org/10.1121/1.415951