Abstract
Measurements of the time variation of ambient noise of the deep ocean at fixed elevation angles have been made in 13-octave bands in the frequency range 200–1500 cps. This is the same frequency range used by Fox [J. Acoust. Soc. Am. 35, 811 (1963)]. The fixed angles are the up- and down-going refraction-surface-reflection (RSR) angles at this depth and result in observations of noise typical of the deep ocean at this depth. The measurements of the level of ambient noise are correlated with simultaneous weather observations. The noise distributions are shown to be peaked at the RSR angles at low sea states and at other angles at high sea states. [Hudson Laboratories, Columbia University Informal Documentation No. 45. Work supported by the U. S. Office of Naval Research.]
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