海洋音響学会誌
Online ISSN : 1881-6819
Print ISSN : 0916-5835
ISSN-L : 0916-5835
音響管法による海底堆積物内の音速と減衰の測定
相根 政幸大谷 隆彦
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ジャーナル フリー

1993 年 20 巻 4 号 p. 217-227

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Sound speed and absorption constant of saturated marine sediment samples of Setouchi (the inland sea of Japan) and Hekinan Coast were measured by use of a tube method in a frequency range from 6.6 kHz to 11.0 kHz. Grain diameter distribution, porosity and density of sediments were also measured for each sample. And sound speed and absorption constant of the same sediment samples were measured in a frequency range from 40 kHz to 250 kHz by free sound field method. The sound speed and the attenuation coefficient were theoretically estimated based on the generalized Biot's theory on the acoustic wave propagation through porous media. A validity of the Biot's theory to apply the saturated marine sediment is confirmed by a comparison between the theoretical estimation and experimental measurements.

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