photographic sound reproducer
photographic sound reproducer[¦fōd·ə¦graf·ik ′sau̇nd ‚rē·prə‚düs·ər]
A sound reproducer in which an optical sound record on film is moved through a light beam directed at a light-sensitive device, to convert the recorded optical variations back into audio signals. Also known as optical sound reproducer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.