Accession Number:

AD0741148

Title:

Sound Disperison and Phase Fluctuations in the Upper Ocean.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s):

Report Date:

1971-12-01

Pagination or Media Count:

91.0

Abstract:

In-Situ measurements of the speed of sound in the upper ocean have revealed the existence of significant dispersion and large fluctuations over the frequency range 25-80 kHz. The near-surface values of c ranges from 6 Msec to -3 Msec relative to the bubble-free value, with a maximum estimated error of 0.5 Msec. It was possible to identify bubbles of surface radius centered around 54 microns down to 4.3 meter depth as well as a population centered around 124 microns at 4.3 M found at all depths. The speed fluctuation showed near-Gaussian probability density functions except at the disperison center frequencies. The standard deviation of the speed varied from 0.27 Msec for 58.0 kHz to 0.52 Msec at 69.6 kHz. Author

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE