compressed-air loudspeaker

compressed-air loudspeaker

[kəm¦prest ¦er ′lau̇d‚spēk·ər]
(engineering acoustics)
A loudspeaker having an electrically actuated valve that modulates a stream of compressed air.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.