structure factors/ A6260 Acoustic properties of liquidsDispersion equation of sound waves in liquid metals as collective motions of positive ions is derived by the method of collective coordinates of Bohm and Pines. Positional correlation of positive ions is taken into consideration by introducing ...
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Excitation of a Langmuir wave by an ion sound wave and relaxation oscillation A detailed analysis of the plasma-maser effect is shown. Coupled equations for the Langmuir and ion sound waves are reduced to the Lotka-Volterra type. A r... M Nambu - 《Phys Rev A Gen Phys》 被引量: 8发表...
Summary This chapter contains sections titled: Introduction Wave Motion Plane Sound Waves Impedance and Sound Intensity Three-Dimensional Wave Equation Sources of Sound Sound Intensity Sound Power of Sources Sound Sources above a Rigid Hard Surface Directivity Line Sources Reflection, Refraction, Scattering...
Classical studies on the descriptions of acoustic field in an area of a near field, in accordance with the relations formulated by Kirchhoff, Huygens or Ra... S Weyna - 《Archives of Acoustics》 被引量: 5发表: 2007年 Nonlinear theory of ionic sound waves in a hot quantum-degenerate electr...
Sound propagation in cylindrical ducts lined with porous material (bulk absorbers) is analyzed. If the porous material is homogeneous, the sound field is b... SW Reinstra 被引量: 0发表: 1983年 Parametrices, singularities and high frequency asymptotics in the theory of sound waves Let Ω≤ R...
Ray theory, in spite of its approximate nature, is a very effective method for the study of sound propagation at sufficiently high frequencies in inhomogeneous media such as the ocean. In this chapter we derive the basic equations of ray acoustics and give their solutions for a stratified ocean...
Lighthill's method of calculating the aerodynamic emission of sound waves in a homogeneous atmosphere is extended to calculate the acoustic and gravity-wav... RF Stein - 《Solar Physics》 被引量: 114发表: 1967年 Noise-source turbulence statistics and the noise from a Mach 0.9 jet Turbulence st...
The dependence of sound transmission on the statistics of a randomly rough interface between two dissimilar fluids is studied by use of the Kirchhoff‐Helmholtz integral. Both plane waves and waves from a point source are considered. The analysis is very similar to that of scatter from a randomly...
As an application the theory confirms the appearance of local elastic vibrations in the strain field of edge dislocations and their absence in the case of screw dislocations. When the theory is applied to the scattering of sound waves on a screw dislocation, one recovers the appearance of ...