ランダムな速度のゆらぎを持つ2次元媒質モデルにおけるP波の散乱について

Abstract

The effect of P-wave scattering on the wave fields is experimentally studied with aperforated thin plate model by means of an ultrasonic technique. As the ratio of thepredominant wavelength to the average size of velocity inhomogeneity approaches unity, theaverage amplitude level of P waves is remarkably attenuated by P-wave scattering, whilethe attenuation of the root mean square amplitude fluctuations is not so. The predominantperiod of P-wave amplitude fluctuations along a wave front is 3 to 4 times as large as thepredominant wavelength. The observed these properties show certain departure from theprediction of the Chernov theory.