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This paper describes the application of electret material to the back plate rather than to the diaphragm of condenser microphones for the purpose of obtaining more flexibility in choice of diaphragm material and better performance characteristics.

Author: Kubota, Hirotake
Affiliation: Sony Corporation, Tokyo, Japan
AES Convention: 55 (October 1976) Paper Number: 1157
Publication Date: October 1, 1976

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Scott Dorsey

Comment posted January 30, 2018 @ 21:45:18 UTC (Comment permalink) When this paper was published. Sony had been making back electret mikes for a while, and Shure was only two years away from introducing the game-changing SM-81.  But this paper was the first time anyone had any idea that it was possible to make an electret microphone with a lightweight diaphram, and the technology published in this paper made the explosion in inexpensible high fidelity microphones of the 1980s possible.  This is another paper that people don't refer to very much today but which changed the world when it came out. (Respond to this comment)

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