optical sound recording
optical sound recording, use of an optical system for registering sound on photographic film; it is a technique widely used in making the sound track (q.v.) of motion pictures.
Citation Information
Article Title:
optical sound recording
Website Name:
Encyclopaedia Britannica
Publisher:
Encyclopaedia Britannica, Inc.
Date Published:
17 January 2018
Access Date:
February 22, 2025