Sound dampening..

[BigRAWesty]

Well a pull up on the reigns after parksy informed me of an issue I have been reading..
And have come across this..
http://www.sounddeadenershowdown.com
It's an interesting read, and has possible saved me hundreds..

Just to cap the link as it is quite long..
Products like dynamat and fatmat are sound dampening products, not sound blocking / absorbing.
So for these products to be at full effect you only need a panel surface coverage of 24%.
The idea if 100% coverage has come from aftermarket auto lines.
The reasons why, Its thin and dense. So the sound waves pass right threw like it was sheet metal.
Quote from link
"
It's the barrier layer that makes the most difference. I use mass loaded vinyl (MLV) for this. MLV is the answer to the question: "How inexpensively can we create a substitute for lead sheeting that will accomplish the same thing"?

Mass loaded vinyl is dense and limp - the ideal characteristics for a barrier. A material's resonant frequency is determined by its mass, stiffness and geometric. Low mass/high stiffness mean high resonant frequency. High mass and low stiffness mean a low resonant frequency. MLV and lead sheeting have resonant frequencies below the the audible range. Makes it an excellent barrier.."

So I my friends will be probably bypassing the dynamat, and going a different option.

Sorry parksy..

[MudRunnerTD]

Very interesting link Kallen.

When i did the rebuild in the GQ i fitted a small section of deadener (A4 size) to the inside of each of the door skins rather than trying to do the whole door. I am pleased with how quite the GQ is even running Simex tyres.

Very good link mate cheers.

[BigRAWesty]

Very interesting link Kallen.

When i did the rebuild in the GQ i fitted a small section of deadener (A4 size) to the inside of each of the door skins rather than trying to do the whole door. I am pleased with how quite the GQ is even running Simex tyres.

Very good link mate cheers.

We'll I did notice the other day when running wires for the middle door speakers, that there was a piece of matting already on the outer skin..
About 130x100..
Sure its not the "magic 24%“ but I'm guessing it's the reason why it's there..

I guess the matting has the floor sorted, but what to use for the door skins??

[liftlid]

Very interesting link Kallen.

When i did the rebuild in the GQ i fitted a small section of deadener (A4 size) to the inside of each of the door skins rather than trying to do the whole door. I am pleased with how quite the GQ is even running Simex tyres.

Very good link mate cheers.

It's not quiet enough for you to hear the cable ties around your tail shaft though!

[Winnie]

I can't wait to take my Patrol off the road for a couple of weeks some time to do this sort of thing.

[Parksy]

Cheers for that westy. I too have been doing a lot of reading on the subject and I've come to the conclusion that the thin foil/butyl sheets are good at reducing vibrations and adding a "solid" feel to the vehicle, but aren't the answer to a super quiet vehicle.
In my research I have found a product called luxury liner pro made by second skin. Only problem is that it's a US company, need to see if we have any Aussie dealers.
http://store.secondskinaudio.com/luxury-liner-pro/
Watched a video on YouTube of this stuff and it looks heavy! Perfect for sound deadening.

[BigRAWesty]

Am looking also. That's a good find

[BigRAWesty]

Something like these to would be the pick I think..
http://pages.ebay.com/link/?nav=item...d=161074028668
http://pages.ebay.com/link/?nav=item...d=360719797099

[Robo]

MLV.
Jaycar stock this stuff by the looks of it.
page 226 in 2013 catalogue.
also online

[threedogs]

I'll still will be using Acoustic batts in the Quarter panels, mainly to stop HWY droning sound

great link Kallen