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中文核心期刊

Volume 45 Issue 4
Jun.  2022
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YUAN Zhuqing, YAN Shefeng, Song H.C., Hodgkiss W.S.. Source level estimation of snapping shrimp sounds in shallow water environment[J]. ACTA ACUSTICA, 2020, 45(4): 535-544. DOI: 10.15949/j.cnki.0371-0025.2020.04.010
Citation: YUAN Zhuqing, YAN Shefeng, Song H.C., Hodgkiss W.S.. Source level estimation of snapping shrimp sounds in shallow water environment[J]. ACTA ACUSTICA, 2020, 45(4): 535-544. DOI: 10.15949/j.cnki.0371-0025.2020.04.010
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Source level estimation of snapping shrimp sounds in shallow water environment

  • 1 Key Labomtory of Information Technology for Aotonomous Underwater Vehicle, Institute of Acoustics, Chinese Academy of Sciences Beijing 100190;

  • 2 University of Chinese Academy of Sciences Beijing 100049;

  • 3 Scripps Institution of Oceanography, UCSD, La Jolla California 92093-0238, USA

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  • Received Date: March 10, 2019
  • Revised Date: December 26, 2019
  • Available Online: June 26, 2022
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    • Abstract
  • Snapping shrimp noise,with high source level and broadband spectrum,can disrupt the operation of sonar and underwater acoustic communication systems.To solve the multi-path and multi-source problem in estimating in situ source level of snapping shrimp noise,a method of automatically estimating source level of snapping shrimp noise is developed.A large-aperture vertical line array is used to locate individual snaps in the near field based on matched-filed processing.As the snaps are strong and transient,the threshold detection method is used to obtain the arrival time of the snapping shrimp signals,then the amplitude is normalized to solve the multi-source problem with large dynamic range.Arrival time structure of the direct path is calculated using ray theory as replicas to match with the data using spherical-wave beamforming.The source level is then calculated using the localization results and the original snapping shrimp sounds.The average peak-to-peak source level of snapping shrimp noise measured in East China Sea is 173 dB re: 1μPa@1 m,with an interquartile range of 168~175 dB re: 1μPa@1 m.
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