지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.9
- 수록면
- 325 - 335 (11page)
- DOI
- http://dx.doi.org/10.4217/OPR.2012.34.3.325
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초록· 키워드
오류제보하기
It is well known that sound waves in the sea propagates under the influence of sea surface andbottom roughness, the sound speed profile, the water depth, and the density of sea floor sediment. Inparticular, an abrupt change of sound speed with depth can greatly affect sound propagation through aneddy. Eddies are frequently generated in the East Sea near the Korean Peninsula. A warm eddy withdiameter of about 150 km is often observed, and the sound speed profile is greatly changed within about400 m of water depth at the center by the eddy around the Ulleung Basin in the East Sea. The characteristicsof low-frequency sound propagation across a warm eddy are investigated by a sound propagation model inorder to understand the influence of warm eddies. The acoustic rays and propagation losses are calculatedby a range-dependent acoustic model in conditions where the eddy is both present and absent. We foundthat low-frequency sound propagation is affected by the warm eddy, and that the phenomena dominate theupper ocean within 800 m of water depth. The propagation losses of a 100 Hz frequency are variable within±15 dB with depth and range by the warm eddy. Such variations are more pronounced at the deep sourcenear the sound channel axis than the shallow source. Furthermore, low-frequency sound propagation fromthe eddy center to the eddy edge is more affected by the warm eddy than sound propagation from the eddyedge to the eddy center.
목차
등록된 정보가 없습니다.
참고문헌 (13)
참고문헌 신청
김봉채 / 2007 / 황해에서 저주파 음파의 해저손실 변동 / Ocean and Polar Research 29(2) : 113 ~ 121
Baer RN / 1980 / Calculations of sound propagation through an eddy / J Acoust Soc Am 67(4) : 1180 ~ 1185
Beckerle JC / 1980 / Sound channel propagation through eddies southeast of the Gulf Stream / J Acoust Soc Am 68(6) : 1750 ~ 1767
Dosso SE / 1987 / Measurement and modeling of downslope acoustic propagation loss over a continental slope / J Acoust Soc Am 81(2) : 258 ~ 268
Gaspin JB / 1971 / Source levels of shallow underwater explosions, In Naval Ordnance Laboratory Report : 58
Baer RN / 1980 / Calculations of sound propagation through an eddy / J Acoust Soc Am 67(4) : 1180 ~ 1185
Beckerle JC / 1980 / Sound channel propagation through eddies southeast of the Gulf Stream / J Acoust Soc Am 68(6) : 1750 ~ 1767
Dosso SE / 1987 / Measurement and modeling of downslope acoustic propagation loss over a continental slope / J Acoust Soc Am 81(2) : 258 ~ 268
Gaspin JB / 1971 / Source levels of shallow underwater explosions, In Naval Ordnance Laboratory Report : 58
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