音波の物体による散乱
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概要
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The problem of the scattering of sound waves by a rigid obstacle is discussed Theoretically. The wave function at an arbitrary point in space is expressed in terms of its values at the surface of the obstacle, in accordance with the boundary conditions. The result is given by an integral equation which can be solved, fllowing the J. Schwinger's method. The amplitude of the scattered waves at large distance from the obstacle is formulated in a form which is stationary with respect to small variations of the surface fields. The scattering cross section of the obstacle for a plane incident wave can be represented as proportional to the imaginary part of amplitude of waves, scattered in the direction of incidence.
- 社団法人日本音響学会の論文
- 1952-01-30