audio-frequency meter

audio-frequency meter

[′ȯd·ē·ō ¦frē·kwən·sē ‚mēd·ər]
(engineering)
One of a number of types of frequency meters usable in the audio range; for example, a resonant-reed frequency meter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.