push-pull sound track

push-pull sound track

[′pu̇sh ¦pu̇l ′sau̇n ‚trak]
(engineering acoustics)
A sound track having two recordings so arranged that the modulation in one is 180° out of phase with that in the other.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.