soundproofing.org : Helping or Just Selling?

  • Thread starter Thread starter ap
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ap

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http://www.soundproofing.org/infopages/soundwalls.html

This site has lot's of apparently usable info. but always leads to a plug for some product of theirs' that looks effective but pretty expensive.

It has a pretty cool chart breaking down different construction methods' STC's and provides a way to uderstand STC in practical terms.

It does say one thing I don't understand: 'Don't use plywood since it transfers sound too well'. This can be found on the "myths" link of the site. This is important to me as I plan to use a sandwich construction and had planned on using OSB/soundboard/drywall. Now it seems they are implying it would be better to make that drywall/soundboard/drywall.
 
Last edited:
ap,


I went plywood/insulation/drywall/airspace/drywall/soundboard/acoustic fabric.

As far as the site goes I am sure they are hooked up with suppliers and point traffic in their direction. Its always good to get every option tho b4 you take the soundproofing plunge.

Bleed
Bleedstreet Recording Studio
 
the link doesn't work for me so I can't comment. I've always believed that sound hates changing mediums.

cheers
john
 
John,

in the link,
Here is what Executivos said:

"As far as plywood on resilient channel, I'm going out on a limb and saying it's probably not a good idea. Everything I've read says that plywood is not as good for isolation as sheetrock, and seeing as how sheets of plywood are like $15 and drywall is $5, I'd use the drywall. "
John?

and here is your reply:

"As far as the plywood verses sheetrock goes, I'd tend to go for both but thinner versions of each. i.e. sheetrock it in 1/2" then overlay it with 1/4" ply for the finish.

BTW Plywood is used extensively throughout studios in place of sheetrock. It has more mass, has a variety of layers for the sound to travel through (something sound doesn't like to do) and provides rigidity to the whole frame especially if it's glued and screwed. I can't see how someone would recommend sheetrock over ply unless they were concerned with the extra cost of ply

cheers
john
 
John, which link is not working?

My intuition tells me plywood would make a good addition to a sandwich based on what's already been said. The soundproofing.org may be simply going on their intuition based on the idea that wood transmits sound easily. They don't state any hard data on it.
 
Ok...so the reason why acoustic instruments like the violin and guitar use wood is so the sound won't transmit? Its better to have your instruments constructed out of Sheetrock instead...




Peace,
Dennis
 
LOL. I see your point, but just because it transmits in one application, doesn't mean it does when 1/2" thick and screwed down. I can see how someone would guess that it wouldn't be good for soundproofing, but things are not always what they seem. I've yet to see any conclusive comparisons.
 
atomictoyz said:
Ok...so the reason why acoustic instruments like the violin and guitar use wood is so the sound won't transmit? Its better to have your instruments constructed out of Sheetrock instead...




Peace,
Dennis
Click to expand...

That's not really a good comparison. Violins and guitars both have a hollow cavity, and a sound hole. fill in that cavity and cover up that sound hole and you'll get a very muffled flat sound. Plywood doesn't operate that way.
 
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