Create a focused speaker so your music targets only the listener. That demodulates at 40 kilohertz, with an H-bridge and ...
Gadget Review on MSN
LRAD sound weapons at protests: How they work and protection tips
LRAD sound weapons at protests use focused acoustic beams up to 162 decibels that cause permanent hearing damage, but ...
As of Jan. 30, the Sonos Beam Gen 2 soundbar is down to just $369 at Amazon. It's usually $499, so that's 26% or $130 in ...
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