Microphone based on fiber optic reflective sensor

Alojz Suhadolnik; Ales Babnik; Janez Ivan Mozina

doi:10.1117/12.221692

25 September 1995 Microphone based on fiber optic reflective sensor

Alojz Suhadolnik, Ales Babnik, Janez Ivan Mozina

Proceedings Volume 2510, Fiber Optic and Laser Sensors XIII; (1995) https://doi.org/10.1117/12.221692
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

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.

Citation Download Citation

Alojz Suhadolnik, Ales Babnik, and Janez Ivan Mozina "Microphone based on fiber optic reflective sensor", Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); https://doi.org/10.1117/12.221692

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