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천해 저주파 잔향음 예측모델

Title
천해 저주파 잔향음 예측모델
Other Titles
Shallow Water Low-frequency Reverberation Model
Author
나정열
Keywords
잔향음 모델; 고유 음선; 전달손실; 다중경로 확장 모델; RAM; Reverberation model; Eigenray; Transmission loss; Multi-path expansion model
Issue Date
2002-11
Publisher
한국음향학회
Citation
한국음향학회지, v. 21, no. 8, page. 679-685
Abstract
천해에서의 저주파 단상태 잔향음 모델 (L-HYREV: Low-frequency Hanyang univ. Reverberation model)을 개발하였다. 음선이론 (ray-theory)에 기초한 전파모델은 해저 내로 투과되는 음파에 대한 효과를 적절하게 고려할 수 없으므로, 해저 내 상호작용을 계산할 수 있는 전파모델이 필요하다. 따라서 본 논문에서는 RAM(Range dependent Acoustic Model)을 이용해서 전달손실을 계산 후, 다중경로 확장모델 (multi-path expansion model)을 이용해서 산출한 전달손실을 보정하였다. 모델의 검증을 위하여 GSM (generic sonar model) 잔향음 모의 신호 및 실측 잔향음 신호와 비교하였으며, 비교 결과 GSM보다 L-HYREV 모델이 저주파 잔향음 예측에 적합함을 확인할 수 있다. Low-frequency mono-static reverberation model for shallow-water environment is presented. It is necessary to develop the transmission loss model to calculate the sub-bottom interaction because the ray-based transmission loss model is difficult to compute the pressure accurately which penetrates the bottom medium. In this paper reverberation level is calculated using the RAM (Range dependent Acoustic Model) to augment the multi-path expansion model because it does not estimate transmission loss accurately in shallow water. The signals generated by the L-HYREV and the GSM are compared with the observed signals and it is showed that the L-HYREV model provides a closer fit to the observed signals than those obtained using the GSM.
URI
https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=JAKO200211921988925https://repository.hanyang.ac.kr/handle/20.500.11754/157888
ISSN
1225-4428; 2287-3775
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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