Directional Acoustic Density Sensor
Abstract
The invention as disclosed is a fiber optic interferometric directional acoustic density sensor that increases the directionality of a vector sensor that is much smaller in size than the wave length of an acoustic wave. This is accomplished through the use of second order directionality by measuring the acoustic fluctuations of fluid density at a point, wherein the acoustic density fluctuations are determined according to the principles of fluid compressibility and conservation of mass using a density fluctuation measuring apparatus that restricts two of the three vector components of the particle velocity of the acoustic wave and that employs a laser interferometer to measure the fluid density fluctuation along the remaining vector component.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 13, 2010
- Accession Number
- ADD020465
Entities
People
- Benjamin A. Cray
Organizations
- United States Department of the Navy