Linear Noise-Cancelling Microphone.
Final rept. 20 May 75-20 Apr 76,
VOUGHT CORP ADVANCED TECHNOLOGY CENTER INC DALLAS TEX
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The document covers the technical details of work performed to improve the performance of noise-cancelling microphones for military use. A major objective was to develop a wider-bandwidth, wider-dynamic-range microphone. Accomplished improvements over predecessor models include 4 dB greater noise-immunity, 12 dB less vibration sensitivity, better electrical shielding, and demonstration that the microphone will operate in extreme military environments and that the 1st order gradient microphone which consists of a ring BIMORPH piezoceramic element and integral pre-amplifier can be hermetically sealed.
- Electrical and Electronic Equipment
- Non-Radio Communications