8 replies to this topic

[damosyzygy]

Greetings all.

Im looking to do some sound deadening on my doors, and Ive really been liking the methods/concepts explained on this site.
www.sounddeadenershowdown.com

On the site, the author mentions a three-step process. First deadening resonance by adding mass to the panels(CLD) , then adding a layer of closed cell foam (CCF), then floating a heavy butyl/vinyl layer over the top (MLV).

However, being overseas, Id rather find product here that does a similar job
I was thinking of perhaps using dynamat products (or similar) as a substitute to the products on the site above, but Im a little confused as to what the equivalents would be. Can anyone help?

As I understand it thus far...
CLD (constrained layer damper) tiles are roughly equivalent to dynaplate?
CCF (closed cell foam) is roughly equivalent to dynaliner?
MLV (mass loaded vinyl) is roughly equivalent to ...?

Thanks in advance!

[TMM]

CLD = dynamat.

CCF/MLV is largely unneccesary in most locations in a car because the standard trim, seats and carpet already perform that role.

[peaandham]

TMM, on 28 January 2012 - 03:40 PM, said:

CCF/MLV is largely unneccesary in most locations in a car because the standard trim, seats and carpet already perform that role.

Actually you would be surprised at how effective using the CCF/MLV combo is to actually blocking noise, the Dynamat will stop resonating panels by adding mass, but it doesnt block noise as such.

CLD = Dynamat/Stinger Roadkill
CCF = Closed Cell Foam or the better option, Dynaliner.
MLV = You can buy mass loaded Vinyl in Aus that does the job or better yet Dynapad.

Edit: If you want to see these put into you have a look at some of FHRX's work, they have a quarterly photo gallery, now I think they used quite a bit of it last year if not the one before.

Edited by peaandham, 29 January 2012 - 09:40 AM.

[damosyzygy]

Thanks peaandham.
Where can I buy MLV from? Is it a Bunnings kinda item?

[peaandham]

TBH I don't think so. Your best bet will be to try ringing around some Upholsters so seeing what they have, you will be asking for Mass Loaded Vinyl, and probably get some CCF from them aswell as you want to separate the Vinyl from the chassis of the car while still blocking noise.

However if you want Dynapad, Frankston Car Audio, FHRX Studio, Phatt Audio, Northfield Capalaba, should be able to provide you with some.

[Big_Valven]

I think you need to spend some time searching the forum. I know MLV and the like are not basic concepts but they have been covered here many times before as to where to get them, how to use them, and alternatives.

[TMM]

peaandham, on 29 January 2012 - 09:39 AM, said:

Actually you would be surprised at how effective using the CCF/MLV combo is to actually blocking noise, the Dynamat will stop resonating panels by adding mass, but it doesnt block noise as such.

I'm not saying it isn't, just that there are very few places (at least in my car) that you would benefit from adding extra foam/MLV over the top of the factory trim/underlay/etc. Same goes for putting dynamat on floor pans where there is already factory mass loading deadener, wool underlay and thick carpet. Still doesn't stop people putting hundreds of dollars of deadener in ineffective spots though lol.

Edited by TMM, 03 February 2012 - 09:32 PM.

[peaandham]

Dynamat you really just need to be selective with. CCF and MLV however you pretty much need to cover the whole floor or else theres no point putting any MLV down what so ever.

[pillowpants]

http://www.solavis.c...uct/supershield

http://www.foamsales.com.au/ this ones in perth for ya

Just be carefull of thickness's (is that a word?) they can make putting the carpet or door skin back on rather tight.