General Category > Science, Technology and Knowledge

Scientists have discovered a shape that blocks all sound–even your co-workers

(1/3) > >>

Free Vulcan:


By Mark Wilson

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.

How was this possible? Did they block the other end of the pipe with noise canceling foams or a chunk of concrete? No, nothing of the sort. 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.

https://www.fastcompany.com/90316833/scientists-have-discovered-a-shape-that-blocks-all-sound-even-your-co-workers

Elderberry:

--- Quote ---The researchers also believe that HVAC systems could be fitted with these silencers,
--- End quote ---

I wonder if they would still reflect back 94% of the sound once coated with dust.

Cyber Liberty:
Kewl.  Next time I want to wear a PVC pipe in my ear I know what I'll do.

Smokin Joe:
I can think of a couple of applications for something like this....

Cyber Liberty:

--- Quote from: Smokin Joe on March 13, 2019, 05:47:20 am ---I can think of a couple of applications for something like this....

--- End quote ---

I dunno...it looks like it's dependent on a standing wave, hence the PVC tube.

Navigation

[0] Message Index

[#] Next page