Mechanisms and Modeling of Wind-Induced Low-Frequency Ambient Sea Noise

摘要

Wind turbulence, surface waves, and wave turbulence have been examined as the noise-generating mechanisms for ambient noise in the 1 to 10 Hz range in the deep ocean. The theoretical derivation, based on stationary ocean surface disturbances, formulates a relationship between wind speed and ambient noise level. The predicted level attributable to these three mechanisms agrees in order of magnitude with the measured data obtained in the Bermuda and Grand Banks areas. Analyses of the noise-level spectrum and wind speed variations have also been discussed to determine the dominant parameters affecting the wind-induced noise. A form of semi-empirical wind noise model is suggested as a reference for data comparison and a guideline for ambient noise measurement. (Author)