4 ms·
http://www.soundlazer.com/what-is-a-parametric-speaker/ http://www.soundlazer.com/what-is-a-parametric-speaker/
by j_s 9y ago
http://www.soundlazer.com/what-is-a-parametric-speaker/ http://www.soundlazer.com/what-is-a-parametric-speaker/
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