Acoustic interferometer

From Wikipedia, the free encyclopedia

This stub does not cite any references or sources. (December 2006) Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed.

An acoustic interferometer is an instrument for measuring the physical characteristics of sound waves in a gas or liquid. It may be used to measure velocity, wavelength, absorption, or impedance. A vibrating crystal creates the ultrasonic waves that are radiated into the medium. The waves strike a reflector placed parallel to the crystal. The waves are then reflected back to the source and measured.