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Sound Proofing
Topic Started: Dec 30 2008, 10:28 PM (4,826 Views)
ClydeWigg3
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[ *  *  * ]
Sorry to be a thread hog here tonight. But, what steps can I take to help deaden the sound inside my Metro? Seems a lot of it comes from the hatch area. Also, can I put any insulation under the hood, or would that make it too hot?

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Johnny Mullet
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Fear the Mullet

I wanted to do something similar to mine. I was thinking of stripping the entire interior, insulating with roof sealant or something, and recarpeting with some nice, thick 4" shag.

Maybe someone else has ideas?
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ClydeWigg3
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4" SHAG? Please. My 18 year old daughter will be driving this off to college. Bad enough it's a Metro. :D
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Bon2000
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theres a great couple deadeners that they sell on the net,its got soundproofing material in a padding for the floors and walls,i started a thread about this very topic about two or three weeks ago and had no responses,im planning on doing this install in two weeks,ill post pics and a tutorial as well,ill use either edead or b-quiet.the tar paper is a cheap cheap alternative,i would just worry about smell on hot days,i used to undercoat vehicles when i worked for g.m. It worked to quieten noise by probably 15 per cent or more,but its nasty to apply and messy as hell.if your going to undercoat...USE A MASK lol
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billy508
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billy508

Shag? Wow Someone might be stuck in the 60s. LOL
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metromad


Sorry Bon, I must have missed your sound dampening post from earlier but when I was an aircraft assember before my desk job, my assembly used a sound dampening material that had an aluminum foil type facing over closed cell foam pad and self-adhesive backing on the other side. The foam part was approx. 1\4" thick. Works very well for deadening sound and also stopping the harmonic vibration in metal panels. I haven't looked outside of aircraft for the same material but I am sure it is available somewhere. Just clean the surface you are going to stick it to, peel the paper off of the adhesive backing and stick it up there. You have to be careful of the aluminum side, it is very sharp on the edges but works very well.
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Rooy


No one's heard of DynaMat? Popular product in the car audio world. http://www.b-quiet.com/ JC Whitney has some stuff too: http://www.jcwhitney.com/Heat-Shield-General-Purpose-Insulation/600002669.jcw?in_dim_search=1
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Johnny Mullet
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Fear the Mullet

Good info on the dynamat Rooy :)

I always thought of that stuff for stereo sound proofing, but yeah, as a sound deadener, it would be perfect :stoner
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metromad


I would just about bet that is the commercially available version of what we use in the aircraft industry.
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kel


Try Lizard Skin for sound deading. It's a spray on application which u'll have to purchase their special spray gun to apply the product. It's a lot lighter than dynomat.
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compjake
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Mostest Elitest Member

If you do it right, expanding spray foam works well for the sides of the car. I filled mine to stop rattles caused by my stereo, it worked wonderfully. :)
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Bigshane90


http://www.secondskinaudio.com/index.php
Try this company. They make far superior products to any other.
The Luxury liner and luxury liner pro is what you want.
It's a mass loaded vinyl used to kill airborne noise. Such as road/tire noise.
If you have air leaks use spray foam.
If you have metal panel resonation use the damplifier. Or a cheaper alternative brand.
But as for the noise your refering too, I am about to line the whole back sides and floor with the lux pro and see how it performs.
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Bad Bent
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Facetious Educated Donkey

Lots of great suggestions, eh. :news

My first item was adding a chrome tip to the muffler to extend it beyond the bumper and direct the sound waves down to the ground.
Next was adding a sheet of the aluminum covered bubble wrap I got off eBay as a layer over the wood/carpet that covers my spare tire.
I added a small throw rug on top of the carpet. It's easier to clean from time to time by just shaking out the little rug.
The expandable foam did a lot to both stiffen the frame and deaden some sound. I sprayed as much as I could in the frame surrounding the rear hatch and the wheel wells.

So now the Wife and can have a fairly normal conversation over the sweet drone of the header/glasspack. :D
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z34-5speed
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Formerly "Tech Certified"

Stay AWAY from Dynamat. You will overpay for a sup-par product (it's just a big name). I've heard nothing but great things from:

www.secondskinaudio.com

They seem to be the best at just about everything, and the price is still better than Dynamat.

When I get to putting my interior back together i'm definitely going with them!

Kyle
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rmcelwee
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I think I am a few weeks away from doing the Metro. Here is how I did my last soundproofing job (finished about 3 months ago):

http://www.lightweightmiata.com/v8/dynamat/

You just cannot beat the price of this dynamat type material.

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