THE EFFECT OF WIND SPEED ON THE SPATIAL CORRELATION OF AMBIENT NOISE,

摘要

Measurements of spatial correlation of ambient noise have been made in Bermuda over an 18-month period by means of a deep-water,bottom-mounted,vertical hydrophone array. Comparisons of these mean correlation values with theoretical values,which are based upon a surface-generated directional noise model,have been made for four frequency bands with wind speed as a parameter. The experimental and theoretical values show excellent agreement for frequency bands of 400-600cps, 600-800cps,and 800-1000cps,regardless of the wind-speed conditions. For the frequency band of 200-400cps,the agreement is wind-speed dependent:Better agreement is obtained at the higher wind speeds. These results serve to verify the applicability of the noise model for the higher frequencies (400-600cps, 600-800cps,and 800-1000cps) and for the low frequencies (200-400cps) when the surface noise levels are high enough to predominate over any horizontal noise components. (Author)