The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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Shallow Water High-frequency Reverberation Model

천해 고주파 잔향음 예측모델

  • 최지웅 (한양대학교 지구해양과학과 해양음향연구실) ;
  • 윤관섭 (한양대학교 지구해양과학과 해양음향연구실) ;
  • 나정열 (한양대학교 지구해양과학과 해양음향연구실) ;
  • 박정수 (국방과학연구소) ;
  • 나영남 (국방과학연구소)
  • Published : 2002.11.01
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Abstract

High-frequency monostatic reverberation model (HYREV: HanYang Univ. REVerberation model) suitable for shallow-water environment is presented. It is difficult to predict reverberation signals in shallow water due to scattering from sea surface and seafloor. The arrival times and transmission losses from the source to scatterers are obtained from the eigenrays. The composite roughness theory is used to predict the boundary scattering. The signals generated by the HYREV and the GSM were compared with the observed signals and it is showed that the HYREV model provided a closer fit to the observed signals than those obtained using the GSM.

천해에서 적용 가능한 고주파 단상태 잔향음 모델 (HYREV: HanYang Univ. REVerberation model)을 개발하였다. 천해의 잔향음은 해수면, 해저면의 산란특성에 의해 영향을 크게 받기 때문에 경계면 산란의 정확한 산출이 가능한 잔향음 모델 개발이 필요하다. 본 모델에서는 고유음선 (eigenray) 계산을 통하여 음원과 산란체까지의 도달시간과 전달손실을 계산하였으며 경계면 산란 예측은 복합 거칠기 (composite roughness) 모델을 이용하였다. 모델의 검증을 위하여 GSM (generic sonar model) 잔향음 모의 신호 및 실측 잔향음 신호와 비교하였으며 비교 결과 GSM보다 HYREV 모델이 천해 잔향음 예측에 적합함을 확인할 수 있었다.

Keywords

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