Ambient Noise
Abstract
This chapter deals with underwater ambient noise over the frequency range from below 1 Hz to several hundreds of kilohertz. Over this broad frequency range, data show that ambient noise has different characteristics at different frequencies, with the spectral slope showing different behavior with varying external conditions, such as the wind speed. It starts with a discussion of the pioneering work on measurements and the description of ambient noise which was carried out by a group of acousticians headed by V.O. Knudsen, who investigated ambient noise in the frequency range from 200 Hz to 50 kHz. The ambient noise level in the sea is best understood in terms of ...
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