Abstract
Low‐frequency ocean ambient noise spectra have been collected at U.S. Navy Pacific SOSUS sites during the last year as a background com‐ ponent of the Acoustic Thermometry of Ocean Climate (ATOC) Program. Preliminary results are presented. Three‐minute averaged spectra were obtained every 5 min; only the relative noise level as a function of frequency is presented because (at this time) unknown offsets prevent determination of absolute levels. One important statistic estimated is the probability as a function of frequency that the noise level exceeds a specified spectral level. [Work supported by the Strategic Environmental Research and Development Program through ARPA.]
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