Acoustic interferometer explained

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

See also

• Acoustic microscopy
• Acoustic emission

References

• Inoue N, Hirai M, Hasegawa T, Matsuzawa K . A new ultrasonic interferometer for velocity measurement in liquids using optical diffraction . J. Phys. D: Appl. Phys. . 19 . 8 . 1439–1447 . 1986 . 10.1088/0022-3727/19/8/012 . 1986JPhD...19.1439I .
• Sukatskas . V.A. . Voleishis . A.P. . Stankyavichyus . É.V. . Armoshka . V.K. . Density measurement of a liquid with an ultrasonic interferometer of constant length . Measurement Techniques . 31 . 11 . 1126–9 . 1988 . 10.1007/BF00864320 . 119854695 .
• 285746 . 1966 . Gucker . F. T. . A Frequency-Modulated Ultrasonic Interferometer: Adiabatic Compressibility of Aqueous Solutions of Nacl and Kcl at 25°C . Proc. Natl. Acad. Sci. U.S.A. . 55 . 1 . 12–19 . Chernick . C. L. . Roy-Chowdhury . P . 16578624 . 10.1073/pnas.55.1.12. 1966PNAS...55...12G . free .