Contour Enthusiasts Group Archives Forums Modifications Audio Sound Damping

i used dynamat everywhere it could be seen (bottom of the trunklid, etc. and then some cheap sheet sound deadener i bought online for under the carpets, rear seat, inside doors, etc.

yeah it was for aesthetic's only.

I used fatmat, cheap and does its job

I put down whatever they sell at circuit city. I wasn't going to put any down, but when I pulled my carpet out to run wires for amps, I decided what the hell and put it in. I still need to do the doors and the trunk sometime.

can anybody explain how to they installed their sound dampers into the doors? did you take all that other foam out or what?

I took (cut) the foam out, then applied the dampener, then re-applied the foam. As an FYI, it made such a great improvement. I recommend it to everyone. It's time consuming... but worth every minute.

~Eric

For doors, i recommend applying a layer of damping material to the inside of the outer door skin. Next, plug any holes that you can on the inner door panels, with something like 1/4" ply or hardboard using liquid nails or silicone to apply. Then put a layer of damping material over the entire cabin side of the inner door panels. Next, put a layer of something like carpet foam between the door panel and the inner door frame. what you have is a multilayer sound deadening system that goes like thsi metal, dynamat, air, metal, dynamat, foam, plastic. Damping material reduces vibrations, but does little to reduce road noise. To reduce road noise, a change in impedance is required which is where the layers comes into play. You could probably go as far as trying to implement some sort of constrained layer damping but I don't know where to begin going into that, or using it effecitvely in a car.

I agree with what you just said, although I have a couple concerns.

1. Pugging any holes with anything permanent would be horrible if you ever needed to get to the window stuff.

2. The carpet foam is great, but holds moisture. I understant that the deadener material on the inside door panel should stop alot of moisture, but it would still be a major concern to me. Hense eD came out with this

When I did mine, I did as you said, layer the outside panel as much as I could, skipped the hole filler thing, pulled all wires from the panel then put down a layer of dynomat type deadener covering the entire inner panel. The Teklite just came out, so I'll eventually get that (once winter passes) to put on the inside of the plastic door panel and put a nice layer of paintable deadener over the current tar stuff. I'd love to do under the carpet, but again, that'll be a spring/summer project.

~Eric