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optical sound
noun
Movies.
- sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack.
optical sound
noun
- sound recorded in the form of a photographic image on cinematograph films
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˜yÐÄvlog History and Origins
Origin of optical sound1
First recorded in 1930–35
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Example Sentences
Examples have not been reviewed.
The conventional "optical" sound track on the edge of the film is replaced by a "sound-stripe" of magnetic material, as in a tape recorder.
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