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Optical coherence tomography - Wikipedia
TONEWHEELS
Were video-audio recording cameras/apparatus available during the 1940s, or were the sounds captured separately or added during production? - Quora
What caused the sound track to be off in old movies? - Quora
TOSLINK - Wikipedia
Giancarlo Barigozzi - Wikipedia
What was the first audio visual recording? - Quora
Optical sound - Wikipedia
Classic Optical Sound Recording
Can sound be used as a carrier for information like electromagnetic radiation is used for transferring data through optical fibers (i.e., the internet)? - Quora