Study of the water-filled cylindrical acoustical resonator for the determination of low frequency attenuation in sea water.
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Authors
Lilly, David Edmund
Subjects
sound absorption
attenuation
resonator
acoustic
attenuation
resonator
acoustic
Advisors
Medwin, H.
Date of Issue
1969-12
Date
December 1969
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
A pair of large cylindrical Pyrex vessels were water-filled to various heights and the acoustic damping constants and resonant frequencies
determined from 3 to 15 kHz. Evacuation of a chamber surrounding the
cylinder and increase of the ratio of water height to vessel radius,
h/R , greater than unity are both shown to reduce the relative ambient
loss of the resonant system,, Although the highest Q (20,800) is much
less than attained with spherical vessels, it is believed that with
thinner walled vessels the extrapolation method of accounting for the
influence of the boundaries will permit laboratory measurement of the
low frequency attenuation of sound in sea water.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.