Author Topic: Soundproofing a dynocell  (Read 5506 times)


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Soundproofing a dynocell
« on: April 21, 2009, 07:27:11 PM »
Hi folks! New guy here.

Im in the prosses of building a garage. Its going to be 9X12 Meters, so fairly big for a sole dude.
Inside it i am going to install a chassis-dyno, but i want to do this propperly the first time. About noisereduction that is.
I am also on a budget here so i need to TRY to keep costs down. Any "from the top of your heads" suggestions?
As i probably wont fully soundproof the garage itself (roof and all), a "cell" inside it will probably need to be built.
soooo... Is it a good idea to build a concrete cell with say... some kind of woolen stuff and sound boards inside?
Of course air intake and exhaust would need some attention.
Any suggestions from you guys would be helpfull. Even links to good books on the subject will help..

Btw: supprisingly few threads on this topic around here  ???

Randy S

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Re: Soundproofing a dynocell
« Reply #1 on: April 23, 2009, 05:53:03 PM »
Well a concrete cell would be the best and yes, you most likely will have to use an absorption product inside...
Like melamine panels.

Your ventilation is where the leaks will be so you will have to do a baffled system and line it with a closed cell foam for noise reduction.

From what I see about Chassis - Dyno is you might want to look into cutting the slab to prevent vibration transmission.
Randy Sieg

Super Soundproofing Co
Ph. 760-752-3030


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Re: Soundproofing a dynocell
« Reply #2 on: April 27, 2009, 09:51:44 PM »
I am also planning on building a dyno cell for a chassis dyno.  The pre-built ones are $50K+ so i am looking to go WAY cheaper.  I was thinking about building a cell inside the shop.  There are large glass windows (single pane) on one side, and a regular drywall wall then a cinder block wall behind that.  We want customers on the street to be able to see inside so we will need some sort of soundproof windows at least 4'x6'.  I think we will build a offset wall setup with 2x4 studs on a 2x6 header and footer with 5/8" drywall.  If we need more we can add more drywall to each side.  Not sure what to do for the windows yet.  The intake will probably be 8'x1' on the front of the roof of the cell, with at least 4 90*angles to block sound from coming out.  The exhaust is going to be trickier.  Not sure exactly but we will probably need 10K CFM of hot exhaust.  I'm not sure if its better to baffle some of the exhaust noise before it gets to the fan with some sort of giant truck mufflers, or something homebuilt, or do it after the fan.  We will S bend the exhaust duct work (est 14") and exit it thru a "hat" type duct thing on the roof.  Any tips would be appreciated.