INVESTIGATION AND APPLICATION OF REVERBERATION MEASUREMENTS IN WATER
Abstract
A method of determining acoustic power output of underwater sound sources is presented employing reverberation techniques similar to those employed in air. Two possible approaches were taken. One following the ideas of R. W. Young, which includes the effect of the direct wave and by use of a correction factor eliminates its effect on the resultant power, which requires knowledge of a steady state average pressure, a decay rate and an average absorption coefficient. The second follows the idea presented in 'Fundamentals of Acoustics' by Kinsler and Frey which requires knowledge of only a steady state average pressure and decay rate. Both methods yield results consistent to within one decibel of a standard acoustic power as determined by pulse techniques. A test setup is proposed for use of this technique with comments given as to desirable characteristics of equipment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0480874
Entities
People
- John D. Donnelly
- William L. Breed
Organizations
- Naval Postgraduate School