1pAO12. Ambient noise generated by surface wind waves---Numerical and experimental results.

Session: Monday Afternoon & Evening, May 13

Time: 4:30

Author: Jin-Yuan Liu
Author: Chuen-Song Chen
Location: Dept. of Marine Environment, Natl. Sun Yat-sen Univ., Kaohsiung, Taiwan 804, R.O.C.


Using a previously developed noise-generation model for sources due to surface processes [W. A. Kuperman and F. Ingenito, J. Acoust. Soc. Am. 67, 1988--1996 (1980)], a numerical study of ambient noise, which incorporates realistic wind wave spectrum (e.g., Pierson--Moskowitz), was made for seismoacoustic ocean wave guides. The results demonstrate a close relationship between the noise field and the source field, allowing one to gain insight to the interplay of both fields. Experimental data of ambient noise and wind waves were collected in an experimental site near the central part of Taiwan. The measured data were also used to generate numerical results of ambient noise which are then compared with experimental data. The comparison has shown a reasonable agreement in the frequency range dominated by the surface wind waves for a receiver not too close to bottom. By modeling the marine environment as a shallow- water seismoacoustic wave guide, it was demonstrated that the noise model of the noise field was greatly affected by the sediment properties. [Work supported by National Science Council of Republic of Chian (Taiwan).]

from ASA 131st Meeting, Indianapolis, May 1996