Abstract
Although sound absorption due to water droplets was shown by Wiener [F. M. Wiener, J. Acoust. Soc. Am. 33, 1200–1205 (1961)] not to be important under average sea fog conditions, it may significantly increase the attenuation of sound under dense or heavy fog conditions. A comparison of propagation conditions is made between normal and dense fogs, for typical fog signal frequencies, using the droplet absorption estimates of Davidson [G. A. Davidson, J. Acoust. Soc. Am. 62, 497–502 (1977)] to determine the resulting impact on detection ranges.
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