Sound waves bypass visual limitations to recognize human activity

Video cameras continue to gain widespread use to monitor human activities for surveillance, health care, home use and more, but there are privacy and environmental limitations in how well they work. Acoustical waves, such as sounds and other forms of vibrations, are an alternative medium that may bypass those limitations.

from Phys.org - latest science and technology news stories http://bit.ly/2QwcFuv

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