glow-discharge microphone

glow-discharge microphone

[¦glō ¦dis‚chärj ′mī·krə‚fōn]
(engineering acoustics)
Microphone in which the action of sound waves on the current forming a glow discharge between two electrodes causes corresponding variations in the current.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.