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Fiber-Coupled Optical Microphones

Motivated by the advantages of optical sensors, like immunity with respect to EMI/RFI and electrically isolated realization, today´s fiber- and micro-optics technology enables the manufacturing of sensitive optical microphones. In the first part of this article a short review of applicable sensing principles is given and pros and cons for realization are discussed. In the second part design, manufacturing and characterization for two fiber-coupled optical microphones employing optical sampling of a membrane are presented.

Authors: Gorelik, Vladimir; Peissig, Juergen; Kudaev, Sergey; Schreiber, Peter
Affiliations: Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany ; Sennheiser electronic GmbH & Co. KG, Wedemark, Germany(See document for exact affiliation information.)
AES Convention:116 (May 2004) Paper Number:6132 Import into BibTeX
Subject:Microphones

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