STUDY OF THE WATER-FILLED CYLINDRICAL ACOUSTICAL RESONATOR FOR THE DETERMINATION OF LOW FREQUENCY ATTENUATION IN SEA WATER.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Pagination or Media Count:
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, hR, 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. Author