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Proceedings Paper

Microphone based on fiber optic reflective sensor
Author(s): Alojz Suhadolnik; Ales Babnik; Janez Ivan Mozina
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Paper Abstract

A simple fiber optic microphone was developed. The sensor operates on the well known principle of reflective sensors where the optical fibers are used as a source and modulated light collecting medium. The optical fiber reflective sensor was applied as a vibration detector of a membrane isntrument. The sensor characteristic was found linear for displacement amplitudes up to 0.6 mm for the large core fiber optic sensor. The measured signals were compared to signals from a commercial dynamic microphone. The test results indicate that the fiber optic microphone is capable of detecting lower frequencies that the high quality dynamic audio microphone.

Paper Details

Date Published: 25 September 1995
PDF: 8 pages
Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); doi: 10.1117/12.221692
Show Author Affiliations
Alojz Suhadolnik, Univ. of Ljubljana (Slovenia)
Ales Babnik, Univ. of Ljubljana (Slovenia)
Janez Ivan Mozina, Univ. of Ljubljana (Slovenia)


Published in SPIE Proceedings Vol. 2510:
Fiber Optic and Laser Sensors XIII

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