Scientists have discovered a shape that blocks all sound

WBahn

Joined Mar 31, 2012
25,068
Let me guess -- this will have a huge impact on society... in ten years.

Color me skeptical. They cranked it up loud and heard nothing? So ALL of the sound from the speaker HAD to go through the pipe and come out the end? NONE of it conducted directly from the box or the pipe's sidewalls into the room?

It attentuated it 94% and that put it below the threshold of human hearing? Assuming that 94% is power, that means it was reduced by about 12 dB. Well, a whisper is about 40 dB above the threshold of hearing. So just how loud were they playing this?

Their video doesn't look like a 94% reduction, either, no matter how you measure it.
 
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