Modeling of ambient noise in ocean environment using coupled mode

Jungyong Park; Hyuckjong Kwon

doi:10.7776/ASK.2022.41.4.397

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2022 Vol.41, Issue 4 Preview Page Next Page

Research Article

Modeling of ambient noise in ocean environment using coupled mode 연성모드법을 이용한 해양 배경소음 모델링

31 July 2022. pp. 397-409

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Abstract

A model is developed for the calculation of sea surface generated ambient noise in the range dependent ocean environment. The sources are located in the horizontal plane all around and their depths are at the near-surface. The receiver array is located in the range dependent ocean waveguide. One-way coupled mode method is used to model the acoustic propagation between the sources and receiver in the range dependent waveguide, and the cross spectral density matrix of noise is derived. In simulation, noise intensity, beamforming result and coherence function are calculated from the cross spectral density matrix. These results are compared with those in the range independent environment. The modeling result shows the effect of the vertical directionality and asymmetry characteristics of the horizontal plane.

Keywords

Coupled mode method

Ambient noise modeling

Sea surface generated noise

Cross spectral density matrix

본 논문에서는 거리 종속환경에서 해수면에 의한 배경소음 모델링을 수행하였다. 모델링 환경에서 음원은 해수면 근처에서 수평 방향의 전 영역에서 위치하고, 수신기 배열은 거리 종속환경의 해양 도파관 내에 위치하였다. 거리 종속환경에서의 소음원과 수신기 간의 음파전달은 연성모드법을 사용하여 계산되었으며, 이를 이용하여 수신기 간 상호 스펙트럴 밀도행렬 식을 유도하였다. 계산된 상호 스펙트럴 밀도행렬은 소음 인텐시티, 빔형성 결과, 코히런스 함수를 계산하는 데 사용되었으며, 그 결과를 거리 독립환경에서의 결과와 비교하였다. 이를 통해 해저면 특성에 의한 수직 방향성과 거리 종속환경에 의한 수평면상의 비대칭성 특성이 모델링 결과에 반영됨을 확인하였다.

키워드

연성모드법

배경소음 모델링

해수면 소음

상호 스펙트럴 밀도행렬

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 41
No :4
Pages :397-409
Received Date : 2022-04-22
Revised Date : 2022-05-16
Accepted Date : 2022-05-16
DOI :https://doi.org/10.7776/ASK.2022.41.4.397

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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