Accession Number : ADA311918

Title :   Acoustical Properties of the MOD Salisbury Test Tank and Techniques for Measurements,

Corporate Author : DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)

Personal Author(s) : Jones, Adrian D. ; Hoefs, Stephen A.

PDF Url : ADA311918

Report Date : JAN 1996

Pagination or Media Count : 61

Abstract : The acoustical properties of the MOD test tank at DSTO Salisbury were determined, so that the limitations on its use for precise acoustical measurements might be known. The tank properties were measured according to the characterisation usually applied to air-filled reverberant chambers. The measurement of these properties is described, together with a summary of relevant sections of reverberant chamber theory, as re-applied to a water-filled tank. Techniques for using the tank for determining the acoustical power output and directivity of sound sources are described, from both a theoretical and a practical viewpoint. Particular attention is given to the complicating effects of spatial and spectral variability, and a description is given of the means of accounting for these effects. Methods for improving the tank properties are discussed.

Descriptors :   *ACOUSTIC MEASUREMENT, *REVERBERATION, SPATIAL DISTRIBUTION, PROBABILITY DISTRIBUTION FUNCTIONS, CONTINUOUS WAVES, AUTOCORRELATION, SOUND TRANSMISSION, SOUND WAVES, AIR WATER INTERACTIONS, AUSTRALIA, UNDERWATER ACOUSTICS, SOUND PRESSURE, SONAR RECEIVERS, ANECHOIC CHAMBERS, ACOUSTIC FIELDS, RADIATED NOISE, ACOUSTIC IMPEDANCE, ACOUSTIC REFLECTION, SOUND RANGING, WATER TANKS, SOUND GENERATORS, ACOUSTIC RESONANCE.

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE