Sound absorbtion

What do you guys use for sound absorbtion? I know Dynamat is popular, but it's expensive as hell.
I was looking at the asphalt based stuff fron PE, and this other stuff called Fat Mat.
Any comments?
I was looking at the asphalt based stuff fron PE, and this other stuff called Fat Mat.
Any comments?
I smell ****, burning ****, glowing cherry red spanked ****.
RT1
Post edited by amulford on
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I usually buy Dynamat 4 ft2 sheet for liike $30. If you mount your speakers in the doors then youll want to apply it to the door panel and maybe some on the door skin.
They also sell kits for trunks, license plates and other.
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I used Tsunami Silencer for a while but since Dynamat came out with the 4 ft2 for $30 pack Ive been using it more. Plus I thought the Dynamat seemed a little more dense than the Tsunami.
Dynamat is easy to find also. Virtually every shop carries it as well as Best Buy and Tweeter. That convenience is worth a lot to me too. Basically I dont think the cheaper alternatives are that much cheaper and since I only ever need a couple sqaure feet of it at a time, Ill stick with it.
Here is the pack Im talking about. It was $30 at Tweeter but Sounddomain has it for $20. I doubt youll get a better deal than that for as good a quality.
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- Anurag
p.s. sorry for momentarily hijacking your thread
"Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
i actually like dynamat original - its lighter and thinner (at least i think it is... isn't it??) than the extreme silvery dynamat... bit cheaper, and does the job fine.
- Anurag
and I get annoyed at the noise level, much less the female in the passenger seat... but that's a good point about the unsprung weight. i just jumped from a 15 to a 17, which obviously increased weight, but a) the shorter sidewall made it worth it and b) to get into the really good forged wheels, i'd need an 18, and i'm not ready for that... as far as brakes, they're gonna get bigger eventually, too, so i guess that's that for reducing unsprung weight :rolleyes:
"Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
-Cody
aha i gots it
http://www.sounddeadenershowdown.com/
I've found that alot of times, it's dorr panels that are rattling due to missing/worn out screws or worn/broken fasteners. You can get small boxes of both for about 5 bucks at any auto parts stores. I'd go that way first 'cause your truck wasn't all that loud on the inside. The biggest noise source in your truck though was probably through teh floor. That rubber floor covering does little to kill road noise. It works great for dirty workin' boots but sucks for road noise absorbtion. Carpeting would do better but that isn't always possible. You might be able to get yourself a new rubber floor covering. What you should do is pull that floor covering out and replace it with a new covering from JC whiney and get some sound deadening material andline teh floor with it. Install the new mat over it and you'll kill alot of noise in teh cab. Check teh interior panels where you are hearing your vibrations and replaced clips where you can. If that still doesn't solve it, then go with a Dynamat like product around the speakers. Just pull teh speakers, place the Dynamat stuff over teh holes, cut the speaker holes out and remount the speakers. No biggie, really. Ford does a good job of lining the insides of the doors with sound deadener so you most likely won't need it there.
That should kill your vibration problems. Vinnie is right though. Almost any product will do so whatever don't hurt your wallet too bad will work fine in 99% of the cases out there. If you need help, let me know. My numbers are still the same.
Now, if you need sound deadening, just find yourself a hairy Italian...like Vinnie...shave him bald from head to toe and glue the hair in place! Works as good as anything out there and if you but the Italian dinner...ah hell, just get him drunk on Old Milwaukee, he'll let the hair go for cheap! If you schmooze him real good, you can probably get him to PAY you to take it! One thing though, just make sure you find one who is wearing a cologne you like.
ford probably does the best job of "OEM" sound deadening i've seen so far. it's not perfect by any means, but they're the ones who invented "quiet steel" (or at least the first to use it), where you've got two thin pieces of metal with a hunk of something akin to dynamat extreme between them. it makes up the floor pans, roofs and firewalls and some other panels... good stuff.
the big hunks of dense styrofoam in the doors may be a pain to work around when running wires and isntalling speakers, but they work... if it rattles, something as simple as a plain cloth added will always quiet it down.
then you have chrysler -- with its world conquering 0.1 mm thick piece of saran wrap in there... wow... what awesome deadening... in fact its so good that you can almost hear your speakers over the wail of semi trucks going by and your tires on the road. piece of ****.
- Anurag
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They told me about expanding foam.
It is fairly cheap, seems some guys use it.
Tar mixed with sand works real good too, just takes forever to cure, adds weight.
I would think the expanding foam will be the lightest.
I GUESS the principle is that when the foam expands, it braces the parts, reducing vibration ?
Like we brace a subwoofer cabinet for home use.
I was never a roofer but I remember the smell of a roof being tarred. Maybe ok in the northern states but not in Texas.
You can buy rolls of gutter shield at home depot for like $10 a roll. Same as dynamat with the sticky rubber on one side and silver coating on the other.