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.

Authors: Sessler, Gerhard M.; West, James E.
Affiliation: Bell Telephone Laboratories, Inc., Murray Hill, NJ
JAES Volume 12 Issue 2 pp. 129-131; April 1964
Publication Date: April 1, 1964

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.