what's the best for insulation of road noise? I don't care about the weight too much... within reason. I hear dynomat a lot... but i just learned it's more for vibration dampening. I'm talking about road noise, engine noise... etc. Thanks

 

I used dynamat on several vehicles. Then, I decided on my next car to test how it affected road noise. I made several runs at 65 on hte freeway and took averages with my dB meter. I used dynamat on the doors(outer skins only) and then did the same testing afterwards and road noise decreased 3 dB. Equal to doubling the power of an amp.

 

how about using brownbread or this stuff.....

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1874121854

I've heard that these other materials are pretty much the same exact thing and will give you the same results...but is much cheaper

just wanted to know if anyone has used them?????

 

What car was that? I know the Civics and Tegs are loud as **** because they have pretty minimal sound deadening.

Mike

 

i've heard of stuff like dynomat, RAAmat, brown bread... just wanted to know what you all think is the best stuff for reduce road noise.

 

This test was in a 2000 Civic

 

Personally, I'd go with RAAmat. It's pretty much the exact same stuff as Dynomax Extreme, but its like 1/4 the price. good stuff IMO, i dont have any in my car, but i have a few friends that do and it does make a difference.

 

Time to get some for the R! Ahahahaha...

Man this sucker is loud!

 

Do a search for mass loading and barrier loading....it's been covered a ton.

To summarize, dynamat like products (mass loaders) will only get you part of the way there. They will keep your panels from vibrating and acting like additional speakers. That product does little to nothing to insulate your vehicle.

To really get after road noise, you need a barrier loader. These materials can work in a few ways, but to keep it simple, the absorb or reflect sound before it gets a chance to enter your cabin. There are lots of good products out there - some are and others are not designed strictly for car audio use. Cascade makes some good products that are desigend for use in audio...others just work well. For instance, a layer of carpet padding for your home can work pretty well for the floor under your carpet. Open and closed cell foam sheets also work very well.

You can achieve great results without adding a lot of mass to your car by combining these two types of products.

 

barrier loaders are a very good idea, I would use foam that is no more than 1/2 inch thick so as not to make it real bulky under your carpet. I would probably use Cascade products. In the years that I have been selling and installing systems I have found it to work well, as well as not giving you the smell that other brands will on a hot summer day with your windows rolled up!!! good luck

 

I used raammat on my civic , now its quiet as hell. Good investment, heavy as hell though.

 

I've used several diferent products in several diferent cars. Dynamat & Brown Bread are essentially the same thing and work pretty well. Cascade Audio makes a rubber/lead product, VB4 I believe its called that works great but its a little spendy and rather heavy. Thats the problem with all sound deadening strategies that I've seen though. They simply add too much weight to the car. I like to actually take the civic to the track so weight is a significant issue.

Heres something i'm trying on the new project car though. In the doors, between the outer skin and the window channels I'm going to epoxy in a very thin sheet of fiberglass (glued to the side beam and at the top and bottom edges) and then fill the gap between the outer skin and the fiberglass with expanding structural foam. Its a **** load of work but the car is all appart right now and i've got time on my hands. If it works it should SIGNIFICANTLY reduce the noise in the car but add no more than 2 or three pounds per door.

I'll let you know how it goes.

P.S. I'm also filling the rear quarter pannels and side sills with foam. In addition to sound proofing it should also improve the rigidity of the body which is a very good thing from a performance standpoint.

Mike


[Modified by 92sleepR, 11:26 PM 12/9/2002]

 

Man, I did my entire car, from the firewall mat back. 2 Layers on the doors, 2 on the back seat and 2 on the trunk floor, everything else has one layer. Its really a pig now...

 

if you need dynamat let me know. i can get it for you for a very good price. anyone for that matter

 

can someone direct me to a retailer of the cascade stuff? is this the most effective and lightest material? i need something very light but works

 

Cascade

 

can someone specify for me which is the lightest cascade product? i'm working on quieting the whole cabin down. thanks

 

They really don't have a light weight version, but your best bet would probably be this. Do a search for their site, they should have the weights up there.

 

The VB 3.5 isn't light but it works REALLY REALLY well. I used it on the door skins of my last car and the diference was amazing. My only problem with it is how much weight it adds to the car.

Mike

 

I dunno once the winter is over I am buying brownbread or this other material on ebay...probablly a 100 sq ft roll...and I am going to lay down as many layers as I can...I am hoping to get at least two on the front doors and trunk..other than that just cover whatever I can...if it sounds quieter and I get better sound awesome...if not oh well...at least I wont keep wondering if it will make a difference or not

 

guys,

i'm not up to date on the whole car audio scene, to specify what i'm looking for, i just want to eliminate road/engine noise with as little weight as possible... better stereo sound would be a bonus. what do you suggest?

 

id go raamat, brown bread or dynamat.

 

thanks for all everyone's help. Ive decided to get brown bread with LComp from b-quiet.com. I know it's going to add a lot of weight, and it's really expensive, but i
drive a lot and i think it's worth it.
Going to pad the flor with brownbread an Lcomp and everything else with just brownbread.