| 31. |
Properties of acoustic and electromagnetic transmission coefficients and transfer matrices of multilayered plates |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1883-1886
Kurt P. Scharnhorst,
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摘要:
With the aid of certain symmetry properties of the elementary transfer matrices of acoustic and electromagnetic field vectors in single layers of absorbing materials, we derive the transformation properties of the system transfer matrices of bonded stacks of absorbing layers under the operation of reversal of the direction of incident radiation. While writing the energy transmission coefficients in such a way that the system transfer matrices appear explicitly, we apply their transformation properties to show that under certain circumstances these coefficients are invariant with respect to front and back surface illumination.
ISSN:0001-4966
DOI:10.1121/1.390235
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 32. |
Reflection, scattering, and absorption of acoustic waves by rough surfaces |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1887-1894
John G. Watson,
Joseph B. Keller,
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摘要:
The first and second moments, i.e., the coherent field and the two‐point, two‐time correlation function, are calculated for the acoustic fields scattered from various rough surfaces. For each surface they yield the reflection, absorption, and differential scattering coefficients, as well as an equivalent boundary condition for the coherent field. Renormalized coefficients are constructed to eliminate divergences at grazing incidence. The results are specialized to surfaces which are statistically homogeneous in both space and time, and to surfaces consisting of randomly placed bosses on a smooth surface. The surfaces considered are slightly rough, moving, soft or hard boundaries, and flat surfaces with random admittances or impedances. The analysis is based on the regular perturbation method or Born approximation. Comparisons with previous results are made.
ISSN:0001-4966
DOI:10.1121/1.390236
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 33. |
Eigenvalues of slender cavities and waves in slender tubes |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1895-1904
James F. Geer,
Joseph B. Keller,
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摘要:
An asymptotic method is used to find the eigenvalues and eigenfunctions of the reduced wave equation in slender cavities, and to find the modes of propagation in slender tubes. The results for the eigenvalues of prolate spheroids are found to be in good agreement with those computed numerically by Chang.
ISSN:0001-4966
DOI:10.1121/1.390237
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 34. |
Transient waves in an elastic plate: Theory and experiment compared |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1905-1907
T. M. Proctor,
F. R. Breckenridge,
Y. H. Pao,
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摘要:
Waveforms calculated by generalized ray theory for a thick plate driven by a step‐function point force are compared with experimental waveforms obtained on a glass plate using an improved piezoelectric displacement‐sensing transducer.
ISSN:0001-4966
DOI:10.1121/1.390238
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 35. |
Erratum: ‘‘Presbycusis, sociocusis, and nosocusis’’ [J. Acoust. Soc. Am.73, 1897–1919 (1983)] |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1907-1909
Karl D. Kryter,
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ISSN:0001-4966
DOI:10.1121/1.389601
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 36. |
Erratum: ‘‘A coupled mode solution for acoustic propagation in a waveguide with stepwise depth variations of a penetrable bottom’’ [J. Acoust. Soc. Am.74, 188–195 (1983)] |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1910-1910
R. B. Evans,
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ISSN:0001-4966
DOI:10.1121/1.389602
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 37. |
The preliminary clinical trial of a multichannel cochlear implant hearing prosthesis |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1911-1913
G. M. Clark,
P. A. Crosby,
R. C. Dowell,
J. A. Kuzma,
D. K. Money,
J. F. Patrick,
P. M. Seligman,
Y. C. Tong,
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ISSN:0001-4966
DOI:10.1121/1.390239
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 38. |
An approximation for inverse Laplace transforms |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1913-1913
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ISSN:0001-4966
DOI:10.1121/1.390240
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 39. |
The Use of the Image Source Method for Modeling Room Acoustics |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1914-1914
Lawrence Edward Zagar,
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ISSN:0001-4966
DOI:10.1121/1.390244
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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| 40. |
Powell named Meritorious Executive |
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The Journal of the Acoustical Society of America,
Volume 74,
Issue 6,
1983,
Page 1915-1915
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ISSN:0001-4966
DOI:10.1121/1.390247
出版商:Acoustical Society of America
年代:1983
数据来源: AIP
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