New optical technique extracts audio from video

Researchers have demonstrated a simple optical technique by which audio information can be extracted from high-speed video recordings. The method uses an image-matching process based on vibration from sound waves, and is reported in an article appearing in the November issue of the journal Optical Engineering, published by SPIE, the international society for optics and photonics.

Read more at: http://phys.org/news/2014-12-walls-optical-technique-audio-video.html

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