Soundproofing a CMU Room 3

[sigma1]

Any recommendations on how to soundproof an 8" CMU wall for a blower room would be appreciated.

 

[JAE]

I've seen movie theaters where they called for all cells to be filled with sand.

Grout would also work. I'm no acoustical engineer, but I think you'd simply be looking to add mass.

 

[cvg]

the best way is with a double wall, with air space in between. Otherwise, even with thick insulation, sound can be transmitted directly through the block and into the drywall which will resonate and transmit the sound.

Filling the cells of CMU block with sand doesn't prevent the sound vibration from travelling through the block itself.

 

[SlideRuleEra]

See "Controlling Sound Transmission Through Concrete Block Walls", a free .pdf download from the Institute for Research in Construction. Here is the link

http://irc.nrc-cnrc.gc.ca/pubs/ctus/ctu13e.pdf

http://www.SlideRuleEra.net

 

[JAE]

The SlideRuleEra calvary comes over the hill again!

 

[sigma1]

Thanks everyone!
Great Link SlideRuleEra THANK YOU!