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On Sat, 13 Apr 2019 10:46:16 -0400, wrote:

On Sat, 13 Apr 2019 03:59:10 -0700 (PDT), True North
wrote:

Its Me

- show quoted text -

"I read an article on how to build a media room. *When building a new house or doing an extensive remodel, you decouple your media room from the rest of the house. *It's mainly putting in twice as many 2x4's in the walls (8" centers) so that every other one is offset an inch or so side to side. *What that does is allow the
sheetrock on on side of the wall to be fastened to 2x4s that are not the same 2x4s that the other side of the walls sheetrock is fastened to. *The walls are decoupled, and with some insulation installed in the middle, the sound does not propagate through the wall nearly as much as normal. *If you were building a new home and money
wasn't an issue, apply the same principle to the floors and ceiling and you have a really quiet media room for both the peeps in there and the rest of the house. *Cool concept."

Duh!
That method of soundproofing has been around for a long time.

I am surprised an 8" concrete block wall is not better than it is. You
can't hear any of the midrange or high tones but the sub woof still
gets through. I wonder if that double framed wall is any better..

===

The trick is to provide mechanical islolation between the inner and
outer wall. Concrete block doesn't really do that. The best sound
insulating material for boats has two layers of lead faced foil
sandwiched around a layer of foam.

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