1993 年 20 巻 4 号 p. 217-227
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.