Marine Physics

Experimental study on acoustic characteristics of seafloor sediment on effects of temperature

  • Hong-Gang- ,
  • Tun-Bai-Hai- ,
  • Ju-Da-Feng
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  • 1 . Faculty of Electromechanical Engineering , Guangdong University of Technology, Guangzhou 510090, China ; 2. Key Laboratory of Marginal Sea Geology , South China Sea Institute of Oceanology , CAS , Guangzhou 510301, China

Received date: 2010-05-05

  Online published: 2011-12-22

Abstract

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.

Cite this article

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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