An experimental study on acoustic properties and their influencing factors of marine sediment in the southern Huanghai Sea

MENG Xiangmei; LIU Baohua; KAN Guangming; LI Guanbao

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MENG Xiangmei, LIU Baohua, KAN Guangming, LI Guanbao. An experimental study on acoustic properties and their influencing factors of marine sediment in the southern Huanghai Sea[J]. Haiyang Xuebao, 2012, 34(6): 74-83.

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An experimental study on acoustic properties and their influencing factors of marine sediment in the southern Huanghai Sea

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
National Deep Sea Center, Qingdao 266061, China

Received Date: 2011-11-29
Rev Recd Date: 2012-05-17

Abstract

Abstract

Using the marine sediment samples collected from the middle western area of the southern Huanghai Sea, the experimental study on sediment acoustic properties and their influencing factors was conducted. The experimental results show that the compressional wave speeds range from 1.359 to 1.695 km/s, and the shear wave speeds range between 12.5 and 70.9 m/s; the finer grained sediment, which is distributed mainly over the east side of study area where the water depth is deeper, corresponds to the lower compressional wave speed and the shear wave speed; the sediment physical-mechanical properties have a great influence on the compressional wave speed and the shear wave speed, and the sediment temperature and the transducer frequency have a definite effect on the compressional and shear wave speeds; the sediment heterogeneity such as layering or inclusions influences the calculation accuracy of wave propagation models. The regressions among sediment physical-mechanical properties and acoustic properties are given in order to provide basic information for national defence and engineering construction.
- Huanghai Sea,
- marine sediment,
- acoustic properties,
- influencing factors

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References(39)

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