Abstract:
It was recognised that the wind usually affects the ocean surface produces deep ocean ambient noise higher than 200 Hz. However, some studies showed that standing waves generated by wind causing ocean surface wave interactions nonlinearly. It can resonate with the sea floor to form seafloor microseisms, resulting in noise below 10 Hz. at this paper, very low frequency noise below 10 Hz at Wake Island is studied for this new wind noise mechanism. The marine environments under different frequency noise spectrum correlation with wind speed, the influence of wind speed and wind direction on the signal of the second group of hydrophone triplet set up at the south and north of Wake Island were compared. Results showed that the ocean ambient noise level had the best correlation with the wind speed at 2 Hz, and the change of wind speed and direction showed a better affection on the spectrum density of ocean ambient at very low frequency noise. Finally, the fitting curve of the hydrophone triplet 2 Hz ocean ambient noise level and wind speed is given, and the crosscorrelation coefficients of the fitting curves are all higher than 0.99.