James P. Stec
Jeffrey C. Buchholz
Larry A. Gunseor
Micro-Optics Technologies, Inc., 8606 University Green #5, P.O. Box 377, Middleton, WI 53562
Richard L. McKinley
Angela R. McCavitt
Armstrong Laboratory, Wright--Patterson AFB, OH 45433
A fiber-optic microphone has been developed that can detect low acoustic sound pressure levels. The microphone is an extrinsic intensity-modulated fiber-optic level sensor. The optical mechanisms involved and the effect on performance of fiber placement with respect to the optical element will be discussed. Plots of frequency response, sensitivity, and a tape recording made using the microphone will be presented.