Sea-bed acoustic parameters from dispersion analysis and transmission loss in the East China Sea |
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Authors: | Zhaohui Peng Ji-Xun Zhou Dahl PH Renhe Zhang |
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Institution: | Nat. Lab. of Acoust., Chinese Acad. of Sci., Beijing, China; |
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Abstract: | As a part of the Asian Seas International Acoustic Experiment (ASIAEX) in the East China Sea, sound propagation signals from wideband explosive sources were measured using a 32-element vertical line array. Measurements were made as a function of range in two perpendicular tracks. Sea-bed geoacoustic parameters based on a fluid half-space geoacoustic model (sound speed, density, and attenuation) are inverted from the sound propagation in the frequency range 100-500 Hz. The sea-bed sound speed and density were first derived from mode arrival time differences which were obtained using a spatial mode filtering technique. Sea-bed acoustic attenuation was subsequently estimated by comparing measured transmission loss with model results. |
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