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Dynamat is a waste of money IMO... I forget what it's "technically" called, but there is a product that you can get at Lowe's or Home depot that is used in roofing applications that is basically the same thing, but a fraction of the price... It's pretty much a rubbery tar-like sheet between paper/foil can't remember really, but it does the same thing... we used in the trunk of my friends' big-body cougar for his speaker install... if you google it you should be able to find what I'm talking about...
Rebuilding the engine... Building a custom front end... T-top conversion... Custom rear hatch..
Custom interior...
sound deadener definatley makes a difference, whether it be dynamat, fatmat, or lowes special.
Id say if you have the money to buy some deadener, do it and you wont be dissapointed.
I forget what it's "technically" called, but there is a product that you can get at Lowe's or Home depot that is used in roofing applications that is basically the same thing, but a fraction of the price... It's pretty much a rubbery tar-like sheet between paper/foil can't remember really, but it does the same thing.
"Peel and Seal" is the correct answer. We were looking for "Peel and Seal." But thanks for playing.:)
Vibrations. As you're driving down the highway, every panel in your car is vibrating at least a small amount. This translates into what is commonly called "road noise." Sound deadener simply adds weight to the applied panels to hopefully reduce some of these vibrations, and thereby, reduce the noise level inside the cabin of the car.
Actually look at a piece of Dynamat. See anything magical about it? Of course not. It's an rubber/asphalt mixture with a foil back. So what makes dynamat so much more expensive than peel n' seal? Not a lot. Marketing most likely. How thick the mat is will directly relate to weight, thereby, directly affecting its sound deadening performance. The only other feature that should be addressed are stickiness at time of application and again at high temperatures. Can you peal the backing and press the mat into place? Or must you use a heat gun to get the mat to stick? That could be a real PITA when you're deadening your entire car. And what about in high temps? When you lock your car up for the day at work, you come back to a 140 degree cabin, has the mat melted and started sliding out of place? Obviously that's not desirable. Some people complain about smell afterwards, but I have yet to meet a person that says the smell didn't go away after a few days.
lol I knew it was something really "technical" like that... lol They did a test on one of those powerblock shows on Spike and tested the peel and seel against dynamat and a few other dynamat knock-offs... other than it's appearance and branding it performed just as well...
Rebuilding the engine... Building a custom front end... T-top conversion... Custom rear hatch..
Custom interior...
Well, I installed all new 6.75" speakers with "some" dynamat for the rears. I ended up having to re-wire ALL the speaker wire and since my car is a 'vert, I had to modify the rear speakers so they would fit. What should have taken a few hours turned into a 6.5 hour job :(
Also, my power window pod (drivers side) was broken and it appears the previous owner siliconed it in place and I had to do the same which wasn't easy.
On a positive note, my stereo sounds much better...
Vibrations. As you're driving down the highway, every panel in your car is vibrating at least a small amount. This translates into what is commonly called "road noise." Sound deadener simply adds weight to the applied panels to hopefully reduce some of these vibrations, and thereby, reduce the noise level inside the cabin of the car. http://www.audiojunkies.com/blog/46/...dener-showdown
I consider road noise the sound of the tires and air whooshing by. And exhaust I suppose. Or other cars.
I would call that road noise more than vibrating panels. just my 2 cents.
yea, sound deadening is "mainly" used to keep panels from vibrating from woofers not road noise... as far as dampening road noise, it does help but it helps by providing dense rubbery mass that sound doesn't travel well through, not by keeping the panels from vibrating... if it was installed on top of the carpet it would still deaden the road noise. It works by absorbing vibration, not by just adding weight... if you've ever driven your car without any carpet you'd see my point...
Rebuilding the engine... Building a custom front end... T-top conversion... Custom rear hatch..
Custom interior...
yea, sound deadening is "mainly" used to keep panels from vibrating from woofers not road noise... as far as dampening road noise, it does help but it helps by providing dense rubbery mass that sound doesn't travel well through, not by keeping the panels from vibrating... if it was installed on top of the carpet it would still deaden the road noise. It works by absorbing vibration, not by just adding weight... if you've ever driven your car without any carpet you'd see my point...
The hell it is. I disagree with each and every sentence. It looks like you need to do a little research into what "sound" actually is. Start with how the human ear actually works. This sentence in particular:
dense rubbery mass that sound doesn't travel well through, not by keeping the panels from vibrating...
is contradictory. Then maybe even visit the dynamat website and read how their product achieves the goal intended. (Both of which you seem to be misled on) Here's what's pictured right on the back of the box.
Basically I see it as neatly tarring the inside of your car. If your panels did have any vibrations in them then sure it would help dampen their squeaks or rattles but I believe there is a distinct difference in the term "road noise" from your definition vs ours. What I understand from your viewpoint is that "road noise" is everything you can hear while driving down the road. And I mean everything. Road noise to myself is basically what I've said before.. Tires, exhaust, general engine noises and the same of other cars on the road. I wouldn't consider a panel that's vibrating "road noise".
Dynamat is used to keep panels from vibrating... I said that, but it is used to keep panels from vibrating as a result of bass harmonics coming from subwoofers... every material on earth has a natural frequency, metal has a very wide range of natural frequency so many low frequency notes will cause them to vibrate, which is what you hear when subs hit hard notes...
The dynamat achieves this vibration deadening quality because it absorbs vibration, it doesn't acheive it by simply adding weight to the metal... it's acoustic dynamics... weight has nothing to do with it other than the fact that in order to dampen the vibration of the metal you need enough acoustically neutral material to counteract the vibrations of the metal, and the material is dense and therefore heavy... a lighter material such as cork, for example, has similar deadening quality as the material in dynamat, it's just not a practical application because it's too hard to install... Ever been to a recording studio? They use a lightweight multi-dimensional foam on the walls to absorb and disperse noise, weight has nothing to do with it...
I suggest you read these:
You'll find much more accurate info in these than you will from a website whose main concern is selling it's products...
Road noise is a result of air vibration, not vibration of the metal of the car... the vibration passes through the metal of the car easily bc it has a wide range of frequency to which it will vibrate, put anything that has a tighter natural frequency, or a more dispersed or random frequency on top of it (not even necessarily attached) and it will deaden the noise significantly. Take out your carpet and padding and you'll realize how much sound-deadening quality a lightweight material can have...
Many modern cars have a "dimpled" undercarriage for this reason... it randomizes the natural frequency of the steel thus reducing road noise...
Rebuilding the engine... Building a custom front end... T-top conversion... Custom rear hatch..
Custom interior...
I've done plenty of research, I've spent countless hours in an acoustics lab at the largest Airforce Research base in the country... You are right in what dynamat does, but wrong in how it does it
Rebuilding the engine... Building a custom front end... T-top conversion... Custom rear hatch..
Custom interior...
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