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Journal Article

Condenser Microphones with Electret Foil

Authors: Sessler, Gerhard M.; West, James E.

Journal of the Audio Engineering Society · Volume 12 · Issue 2 · pp. 129–131 · April 1964

Abstract

A new kind of condenser microphone which utilizes a foil electret and therefore requires no external dc bias is described in this paper. The frequency response of the microphone is within ±3 db from 50 to 15000 cps. Sensitivities as high as -50 dbv re 1 µbar have been achieved. Due to its relatively low impedance, the microphone can be connected directly to conventional transistors amplifiers. Measurements over a period of about one year have shown no degradation of microphone sensitivities and indicate excellent stability of these systems.

Details

Publication
Journal of the Audio Engineering Society
Volume
12
Issue
2
Pages
129–131
Publication date
April 6, 1964
Affiliation
Bell Telephone Laboratories, Inc., Murray Hill, NJ (See document for exact affiliation information.)
Type
Journal Article