Thin filament interferometric microphone Academic Article uri icon


  • A thin filament which follows the motion of a gas is used to measure small pressure fluctuations for photoacoustic spectroscopy. Optical heterodyne detection of laser radiation scattered from the filament provides a sensitive measurement of its displacement. This device may be particularly useful for low-pressure spectroscopy or under experimental conditions where the use of a standard microphone is inconvenient.

author list (cited authors)

  • Miles, R. B., Gelfand, J., & Wilczek, E.

citation count

  • 2

complete list of authors

  • Miles, RB||Gelfand, Jack||Wilczek, E

publication date

  • August 1980