Temperature changes which affects the acoustic characteristics of marine sediment is a very important factor. The coaxial differential distance attenuation measurement method is applied on measuring the seafloor sediment acoustic characteristics at different temperatures in this article. As the temperature increasing , some conclusions of acoustic characteristics of marine sediment could be draw: 1) sediment sound velocity changes slowly with obvious fluctuation , but the overall trend of decline is nearly in linear; 2) decay amplitude has been falling in a linear amplitude attenuation downward trend with some volatility outliers; 3) attenuation coefficient shows parabolic-like trend, with strong nonlinearity. As a special type, the speed of sound decreasing with increasing temperature requires further theoretical and experimental study to explain the causes.
Hong-Gang-
,
Tun-Bai-Hai-
,
Ju-Da-Feng
. Experimental study on acoustic characteristics of seafloor sediment on effects of temperature[J]. Journal of Tropical Oceanography, 2011
, 30(6)
: 70
-73
.
DOI: 10.11978/j.issn.1009-5470.2011.06.070
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