Dynamat....how does it work?

[have2goski]

I tried looking around here as well as the web and didn't really turn up what i was looking for.

My question is.....how does dynamat work? Is it simply a mass damper that is applied to everything and in turn reduces the vibration by increasing the natural frequency wave length?

didn't know if there is some king of accoustical-space-age-design-surface-engineering-thing-a-ma-jig going on with it or something.

If it is just a mass thing...any idea how heavy it is? say per 10 sq. feet

anyway give me your thoughts if you have any on the subject.

I ask because I have been looking for something to quite down the road noise and I guess the audio benefits would be an added bonus I wouldn't turn away

thanks

 

[Spdrcer34]

'It's just a mass thing' would be the EASIEST explanation.

If you wanna go a bit more indepth Dynamat's website goes into the science behind it all.

Ryan

 

[have2goski]

I saw the little explanation graphics they had on there. I was just looking to see if any actual users out there had any other imput/ideas on the matter from their expereince.

I was actually certified as a level II vibration analyst at a co-op I had awhile back. We dealt mainly with bearings and predictive maintainence though. From my education/expereinces, only thing I see going on is a mass thing. Maybe somebody from a 'music' industry knows otherwise.

 

[Wagonized]

it simply weighs down the panel making it harder for it to resonate....but not impossible. Dynomat itself is wayyy overpriced IMO...there are products out there that do the same thing for a fraction of the price. such as brownbread

 

[Redrig]

Ive put brown bread in and i must say white does just the same.

 

[Wagonized]

try multigrain next

 

[Nate1]

Not only does it weigh down the panel, but the energy from sound is converted into heat as the fiberous mix "flexes" thus disappating more energy that would otherwise become sound....

 

[jgilbs]

it increases the resonence frequency of whatever it is applied to(does this by converting the mechanical energy of sound into heat energy within the dynamat material)

some people have said roofing material rolls (forget what theyre called, but theyre asphalt based) do the same thing for MUCH cheaper. i dont know how comfy I would be with all of those petroleum fumes when im driving or parking the car in hot sun, tho.

 

[Spdrcer34]

I have used Peel-n-Seal in place of Dynamat. It does VERY well. It doesn't weigh any more than Dynamat either. The improved sound is AMAZING. I have applied 2 layers to the roof, and THAT was a HUGE difference alone. I am shaving the hatch on my X next week then I can put some Peel-n-Seal on the hatch which will help out even more.

As for a 'smell', it gives of NOTHING, ZERO, ZIP, ZILCH, NADA in the way of fumes. Even when I was applying it to the X with a Heatgun.....NONE AT ALL! I have heard of OTHER products giving off a smell, but NEVER have I had a problem with this Peel-N-Seal.

Ryan

 

[F14CRAZY]

I'm in the process of doing Fatmat. Runs about $1.30 per square foot in the end. I'll post back soon with lots of pix.

 

[BeauJ]

Anyone else use the "fatmat"?