Interesting - acoustic meta material

[Amicus717]

I can think of a few interesting applications for this:

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

 

 

[craigb]

Wow!  First new "thing" that has really impressed me in a long time! ?

 

Then the story is immediately followed by 3D-printed tiny homes that are almost exactly the same size as a jail cell.  Wonderful... ?

[JohnG]

When does it become commercially available? I want some.

Edited March 13, 2019 by JohnG
Shpeeling agin.

[craigb]

Will they make some equipped with muzzles?  I know some people... ?

[paulo]

"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."

Am I the only one who could hear some of it before he took the thing out then?

[Amicus717]

I think the writer was being hyperbolic. I could hear a bit, but the difference made by removing the ring was still pretty impressive, especially when you consider the ring wasn't blocking the tube opening at all.

[craigb]

2 hours ago, paulo said:

"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."

Am I the only one who could hear some of it before he took the thing out then?

Yes, you are the only one. ?

[paulo]

Note to self.......remember that craigb is deaf.

[craigb]

What?