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ElectroComponent Science and Technology
Volume 9 (1982), Issue 3, Pages 197-203
http://dx.doi.org/10.1155/APEC.9.197

Piezoelectric Plastic Microphones

Plessey Connectors Limited, Northampton, UK

Received 26 October 1981

Copyright © 1982 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Current types of microphones are described and compared with designs based on a bimorph diaphragm made from piezoelectric poly(vinylidene fluoride) film. A pressure operated microphone for telephone handsets has been fully developed. Polymer film diaphragms lend themselves to highly symmetrical designs so that both first and second order pressure gradient noise cancelling units have been based on them and compare well with the available alternatives.