• Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Journal of the Acoustical Society of America

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue

Dec 1983

Volume 74, Issue 6, pp. 1673-1934

Page 2 of 5 Pages Previous Page Next Page | Jump to Page

Sounddrops...?

C. M. L. Leonard and Andre Mirabelli

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1855-1860 (1983); (6 pages)

Full Text: | Download PDF

Show Abstract
We consider the question: Does sound fall under gravity?
Show PACS
43.28.Bj Mechanisms affecting sound propagation in air, sound speed in the air
43.40.At Experimental and theoretical studies of vibrating systems

Characters of the air flow inferred from detailed spectral analysis of acoustic sounder echoes

Giorgio Fiocco and Giangiuseppe Mastrantonio

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1861-1865 (1983); (5 pages)

Full Text: | Download PDF

Show Abstract
Detailed spectral analysis of sodar echoes can be utilized to yield information on the structure and vorticity of the wind field within the scattering volume. The analysis is applied to a case of unusually intense turbulence and wind shear recorded at the Capanna Margherita, Monte Rosa, Italy (4559 m.a.s.l.).
Show PACS
43.28.Py Interaction of fluid motion and sound, Doppler effect, and sound in flow ducts
92.60.Gn Winds and their effects
43.28.Tc Sound-in-air measurements, methods and instrumentation for location, navigation, altimetry, and sound ranging

The effective nonlinearity parameter for immiscible liquid mixtures

Robert E. Apfel

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1866-1868 (1983); (3 pages) | Cited 4 times

Full Text: | Download PDF

Show Abstract
A relation has been derived which gives the effective nonlinearity parameter of a system of immiscible liquids, given the individual nonlinearity parameters as well as the respective densities, compressibilities, and volume fractions in the mixture.
Show PACS
43.25.Ba Parameters of nonlinearity of the medium
62.60.+v Acoustical properties of liquids

Acoustic propagation in wall shear flows and the formation of caustics

Gregory A. Kriegsmann and Edward L. Reiss

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1869-1879 (1983); (11 pages)

Full Text: | Download PDF

Show Abstract
The propagation of acoustic waves from a high‐frequency line source in a two‐dimensional parallel shear flow adjacent to a rigid wall is analyzed by a ray method. The leading term in the resulting expansion is equivalent to the geometrical acoustics theory of classical wave propagation. It is shown that energy from the source is radiated either directly to the farfield, or by first reflecting from the wall. In addition, energy is trapped in a channel adjacent to the wall and downstream from the source. The rays in this channel form an infinite sequence of caustics progressing downstream. Since the geometrical acoustics approximation is invalid on and near caustics, a boundary layer method is employed to determine the acoustic fields near the caustics. It is shown that the amplitude of the fields on and near the caustics is k2/3 larger than the geometrical acoustics field for large k. Here k is a dimensionless wavenumber of the source. Moreover, the vorticity of the acoustic fields in the caustic regions is k7/6 larger than the geometrical acoustics field. The possible significance of these results for vehicle self‐noise and the formation of turbulent spots in the sublayer of a turbulent boundary layer is discussed.
Show PACS
43.20.Dk Ray acoustics
43.20.Hq Velocity and attenuation of acoustic waves
43.20.Rz Steady-state radiation from sources, impedance, radiation patterns, boundary element methods

The scattering integral equation for surfaces containing curvature discontinuities

Norbert N. Bojarski

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1880-1882 (1983); (3 pages)

Full Text: | Download PDF

Show Abstract
The conventional formulations of the acoustic and electromagnetic scattering integral equations, which are valid only for surfaces with continuous and differentiable curvature, are generalized to surfaces containing curvature discontinuities. It is argued that these generalizations are essentially a generalization of the 1859 and 1882 Kirchhoff integration of the scalar and vector wave equations, respectively, as well as a generalization of the 1938 Stratton–Chu integration of Maxwell’s equations.
Show PACS
43.20.Fn Scattering of acoustic waves
03.50.De Classical electromagnetism, Maxwell equations
41.20.Jb Electromagnetic wave propagation; radiowave propagation
43.20.Bi Mathematical theory of wave propagation

Properties of acoustic and electromagnetic transmission coefficients and transfer matrices of multilayered plates

Kurt P. Scharnhorst

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1883-1886 (1983); (4 pages) | Cited 2 times

Full Text: | Download PDF

Show Abstract
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.
Show PACS
43.20.Fn Scattering of acoustic waves
43.20.Hq Velocity and attenuation of acoustic waves
03.50.De Classical electromagnetism, Maxwell equations
41.20.Jb Electromagnetic wave propagation; radiowave propagation
43.20.Bi Mathematical theory of wave propagation

Reflection, scattering, and absorption of acoustic waves by rough surfaces

John G. Watson and Joseph B. Keller

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1887-1894 (1983); (8 pages) | Cited 1 time

Full Text: | Download PDF

Show Abstract
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.
Show PACS
43.20.Fn Scattering of acoustic waves
68.35.Gy Mechanical properties; surface strains
68.35.Iv Acoustical properties
43.20.Bi Mathematical theory of wave propagation

Eigenvalues of slender cavities and waves in slender tubes

James F. Geer and Joseph B. Keller

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1895-1904 (1983); (10 pages) | Cited 1 time

Full Text: | Download PDF

Show Abstract
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.
Show PACS
43.20.Ks Standing waves, resonance, normal modes
43.20.Mv Waveguides, wave propagation in tubes and ducts
43.20.Bi Mathematical theory of wave propagation

Transient waves in an elastic plate: Theory and experiment compared

T. M. Proctor, F. R. Breckenridge, and Y. H. Pao

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1905-1907 (1983); (3 pages) | Cited 2 times

Full Text: | Download PDF

Show Abstract
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.
Show PACS
43.40.Le Techniques for nondestructive evaluation and monitoring, acoustic emission
43.20.Px Transient radiation and scattering
43.20.Dk Ray acoustics

Erratum: ‘‘Presbycusis, sociocusis, and nosocusis’’ [J. Acoust. Soc. Am. 73, 1897–1919 (1983)]

Karl D. Kryter

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1907-1909 (1983); (3 pages)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.10.Ln Surveys and tutorial papers relating to acoustics research; tutorial papers on applied acoustics
43.66.Sr Deafness, audiometry, aging effects
43.50.Qp Effects of noise on man and society
99.10.Cd Errata

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)]

R. B. Evans

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1910-1910 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.30.Bp Normal mode propagation of sound in water
43.30.Dr Hybrid and asymptotic propagation theories, related experiments
43.20.Mv Waveguides, wave propagation in tubes and ducts
99.10.Cd Errata

The preliminary clinical trial of a multichannel cochlear implant hearing prosthesis

G. M. Clark, P. A. Crosby, R. C. Dowell, J. A. Kuzma, D. K. Money, J. F. Patrick, P. M. Seligman, and Y. C. Tong

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1911-1913 (1983); (3 pages)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.66.Ts Auditory prostheses, hearing aids

An approximation for inverse Laplace transforms

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1913-1913 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
02.60.-x Numerical approximation and analysis
02.70.-c Computational techniques; simulations

Acoustic emissions could indicate weld quality

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1913-1914 (1983); (2 pages)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.40.Le Techniques for nondestructive evaluation and monitoring, acoustic emission

An Analysis of Acoustic and Seismic Wave Resonances

Godwin Chinimeri Igiri

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1914-1914 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.20.Ks Standing waves, resonance, normal modes

Experimental Investigation of Multifrequency Ultrasonic Nonspecular Reflection

Douglas D. McLennan

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1914-1914 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.35.-c Ultrasonics, quantum acoustics, and physical effects of sound

The Use of the Image Source Method for Modeling Room Acoustics

Lawrence Edward Zagar

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1914-1914 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.55.Ka Computer simulation of acoustics in enclosures, modeling

A Computer Simulation and Modal Analysis Study of Compressor Manifolds and Tuning Phenomena

Jeffrey J. Nieter

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1914-1914 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.20.Ks Standing waves, resonance, normal modes
43.20.Mv Waveguides, wave propagation in tubes and ducts
43.28.Py Interaction of fluid motion and sound, Doppler effect, and sound in flow ducts

Mermelstein, Paul, succeeds Bishnu Atal as Associate Editor of the Journal

R. Bruce Lindsay

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1915-1915 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.05.-k Acoustical Society of America
43.05.Ky Members and membership lists, personal notes, fellows

Powell named Meritorious Executive

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1915-1915 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.05.Ky Members and membership lists, personal notes, fellows

NIH Conference on Diagnostic Ultrasound Imaging in Pregnancy

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1915-1915 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.10.Ce Conferences, lectures, and announcements (not of the Acoustical Society of America)
43.80.Qf Medical diagnosis with acoustics

International Convention of the Alexander Graham Bell Association for the Deaf

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1915-1915 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.10.Ce Conferences, lectures, and announcements (not of the Acoustical Society of America)
43.66.Sr Deafness, audiometry, aging effects

NRC seeks applications for research associateships

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1915-1916 (1983); (2 pages)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.10.Ce Conferences, lectures, and announcements (not of the Acoustical Society of America)

Report of the Auditor

Robert T. Beyer

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1917-1919 (1983); (3 pages)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.05.-k Acoustical Society of America

Noise‐Con '83: Quieting the Noise Source, edited by Robert Lotz

Richard J. Peppin

J. Acoust. Soc. Am. Volume 74, Issue 6, pp. 1921-1921 (1983); (1 page)

Full Text: | Download PDF

Abstract Unavailable
Show PACS
43.10.Hj Books and book reviews
43.50.-x Noise: its effects and control
Page 2 of 5 Pages Previous Page Next Page | Jump to Page
Close

Home Publications Meetings Contact ASA Site Map Back to Top

Copyright © Acoustical Society of America

close