Comparison of score-penalty method and matched-field processing method for acoustic source depth estimation

Keunhwa Lee; Wooyoung Hong; Jungyong Park; Su-Uk Son; Ho Seuk Bae; Joung-Soo Park

doi:10.7776/ASK.2024.43.3.314

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2024 Vol.43, Issue 3 Preview Page Next Page

Research Article

Comparison of score-penalty method and matched-field processing method for acoustic source depth estimation 음원 심도 추정을 위한 스코어-패널티 기법과 정합장 처리 기법의 비교

31 May 2024. pp. 314-323

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Abstract

Recently, a score-penalty method has been used for the acoustic passive tracking of marine mammals. The interesting aspect of this technique lies in the loss function, which has a penalty term representing the mismatch between the measured signal and the modeled signal, while the traditional time-domain matched-field processing is positively considering the match between them. In this study, we apply the score-penalty method into the depth estimation of a passive target with a known source waveform. Assuming deep ocean environments with uncertainties in the sound speed profile, we evaluate the score-penalty method, comparing it with the time-domain matched field processing method. We shows that the score-penalty method is more accurate than the time-domain matched field processing method in the ocean environment with weak mismatch of sound speed profile, and has better efficiency. However, in the ocean enviroment with strong mismatch of the sound speed profile, the score-penalty method also fails in the depth estimation of a target, similar to the time-domain matched-field processing method.

Keywords

Score-penalty method

Time-domain matched-field processing method

Depth estimation of target

Sound speed mismatch

최근 해양 포유동물의 수동 음향 추적을 위해 스코어-패널티 법이 사용되고 있다. 전통적인 시간영역 정합장처리 기법은 손실함수에 측정신호와 손실신호간의 정합도만을 고려하는 반면, 스코어-패널티법은 측정 신호와 모의 신호의 비적합도를 반영하는 페널티 항도 추가로 고려한다. 본 연구에서는 스코어-패널티법을 파형을 알고 있는 수동 표적의 심도 추정에 적용했다. 수중 음속 구조의 불확실성을 갖는 심해 환경을 가정하고, 스코어-패널티법의 성능을 평가했다. 또한 시간영역 정합장 처리기법의 결과와 서로 비교했다. 약한 수중 음속 오정합 환경에서 스코어-패널티법은 시간영역 정합장 처리기법보다 높은 정확도를 보이고 효율적으로 동작했다. 그렇지만 수중 음속 구조의 오정합이 매우 큰 경우에는 두 기법 모두 표적의 심도 추정에는 실패했다.

키워드

스코어-패널티 법

시간영역 정합장 처리 기법

음원 심도추정

음속 오정합

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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 : 43
No :3
Pages :314-323
Received Date : 2024-02-01
Accepted Date : 2024-04-29
DOI :https://doi.org/10.7776/ASK.2024.43.3.314

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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