Slave to Noise No More March 12, 2019
Posted by geoff in News.trackback
This is way too cool:
Scientists have discovered a shape that blocks all sound–even your co-workers
A team of Boston University researchers recently stuck a loudspeaker into one end of a PVC pipe. They cranked it up loud. What did they hear? Nothing.
…The pipe was actually left open save for a small, 3D-printed ring placed around the rim. That ring cut 94% of the sound blasting from the speaker, enough to make it inaudible to the human ear.
Here’s the ring, which is totally passive:

[Photo: Cydney Scott/Boston University]
But it’s still way too cool.
Comments
Sorry comments are closed for this entry
Can it be customized to fit a specific individual’s mouth?
I want one for my TV.