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

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...

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Bibliographic Details
Main Authors: Yen,Nai-Chyuan, Perrone,Anthony J
Format: Report
Language:English
Subjects:
ACOUSTIC WAVES
Acoustics
AMBIENT NOISE
DEEP OCEANS
LOW FREQUENCY
LPN-NUSC-65062
LPN-NUSC-A-650-70
MATHEMATICAL MODELS
NOISE(SOUND)
Numerical Mathematics
OCEAN SURFACE
PARAMETRIC ANALYSIS
REYNOLDS NUMBER
SPECTRUM ANALYSIS
SURFACE WAVES
TURBULENCE
WATER WAVES
WAVE PROPAGATION
WIND VELOCITY
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Summary: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)