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Intensity Vector Acoustics and Mid-Frequency Sonar Studies, and Experiment in Korean Coastal Waters

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[Technical Report, Final Report]

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This report cover research completed between 15 January 2017 and 14 April 2021, funded by the ONR grant entitled Intensity Vector Acoustics and Mid-Frequency Sonar Studies Experimental in Korean Coastal Waters. The objective was to increase our understanding of the acoustic intensity vector field as it applies to shallow water propagation and reverberation. A secondary objective involved two field experiments in Korea, one conducted in May 2017 with the second cancelled owing to COVID-19.The start of this grant also overlapped with preparation and execution of the Seabed Characterization Experiment2017 SBCEX2017 experiment off New England in March 2017. Vector acoustic data emerging from SBCEX2017 was of extremely high quality relative to the Korea data, and thus the majority of effort from this grant was directed towards analysis of SBCEX2017 data. Three works are included in this report and considered generally representative of the technical output of this grant. Two involve modeling and interpretation of vector acoustic observations using IVAR system during SBCEX2017.The third involves a study of 6-years of acoustic data obtained from the Regional Cabled Array site off the Oregon coast, revealing a subtle, but clearly discernable, influence of reduced shipping noise owing to the worldwide COVID-19 epidemic.


Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics
  • Acoustic Detection and Detectors

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[A, Approved For Public Release]