sound dampening material

[SayNoToPistons]

Would you say the interior of the CX-5 benefits from dampening the doors or the truck area? I ask this because I have a roll enough for just the doors or the trunk area. Also because most of the road noises I've witnessed is from the rear wheel wells and hatch.

 

[hollis]

Personally, the doors are #1, followed by rear tailgate and lastly truck area. Do slap a little bit on the rear license plate too. When I had my after market bass up, it started to rattle the rear license plate its all good with it on now...

from post #3 in this thread:

According to Dynamat:

What part of the vehicle should I do first?
A: We recommend applying Dynamat to any surface you can easily reach. In general, we recommend treating your vehicle in the following order: Doors, Trunk, Rear Deck, Floors, Roof, Hood, then Fenders.

 

[ta240]

According to Dynamat:

What part of the vehicle should I do first?
A: We recommend applying Dynamat to any surface you can easily reach. In general, we recommend treating your vehicle in the following order: Doors, Trunk, Rear Deck, Floors, Roof, Hood, then Fenders.

Is their recommendation more for improving audio quality or just sound deadening? I can see how sealing the doors up and removing some of the resonance could improve the sound quality. I've found for eliminating road noise I have the best luck starting with the fender areas. Adding both the thin dense mat and the thicker rubber and multi-layer stuff around the rear fender areas had the greatest improvement to my ear. The fender areas tend to be great echo chambers for the road noise. Stuffing sound deadening into the area between the plastic trim on the sides of the rear seat seemed to make a audible difference in mine. Otherwise there isn't much besides a layer of plastic then an open area then metal and then tires and road there.
That and fitting more of the thicker rubber material in the firewall area on the inside got me the best results but then again it could just be a placebo effect of spending the time and money on it.

 

[hollis]

Primarily dynamat/ sound dampers (deadeners) are to increase audio quality by retaining mid and low frequencies from escaping the thin structure of the vehicle shell. Per their instructions, you are suppose to use it sparingly and primarily near the speakers only.

Take a look at my tailgate pics, one has just sound damping material with about 50% coverage and another one has the same sound damping material but covered with sound absorbing material (had some extra under layment from floating flooring). I used the sound absorbing material in truck, rear fenders, and tailgate. Since its not waterproof, I avoided using it in the doors. There are better thick rubber material you stick on or spray on that could be used as you mentioned. In my case I over used the sound damping material in doors by so much that it greatly reduces outside noise. In the same affect, I had my radio near max and closed all the doors/windows then stood outside the car and it definitely reduced how much I heard.

 

[RedBaron]

See and read this at: http://www.sounddeadenershowdown.com/

The guy really knows what he's doing. He helped me with my convertible and actually reduced the noise EVEN WITH THE TOP DOWN! (Note: this was also my wife's opinion, and she is a really disinterested observer!)

 

[squibcakes]

I put dynamt in over a couple of weeks.

First I did the front doors:

I didn't notice much drop in road / wind noise doing the doors. I did about 80% of the outer skin, the plastic speaker baffle, and the metal work around the the speaker, and metal around the top edge of door.

What I did notice was that the mid bass did improve a lot at mid to high volumes (90+db), the doors don't sound tinny when tapping, less music heard outside the car, and the doors have amore solid feeling when closing.

I wouldn't recommend doing the doors unless you are running amped speakers.

Second was the Tail Gate:

For me this has made the most impact. I no longer hear trucks or loud cars sitting behind me when stopped at lights. The number plate no longer vibrates.. For me I would do this first.

Third was the rear tyre wells:

I did these and the surrounding outer skins of the rear of the car. The metal work around the tyre wells is pretty solid. I don't think that dynamat has helped much and I propbably should have used some carpet underlay instead. Lighter and cheaper. The front of the rear wheel wells are very close to the passangers and adding dynamat did reduce the tinny sound when tapping but any other advantge I can't say.

I haven't really done much around the spare tyre well as it is pretty solid and has two types of factory sound deading on it; gluey stuff and felt. I may do something with this later.

Forth is the rear doors:

I've done one door with dynamat, but I'm still running factory speakers of the head on the rear doors. Besides blocking the music going outside - there isn't really much advantage unless running amped speakers in my opinion - but I will do for future proofing...

Anyway, that is my feedback.

 

[phunky.buddha]

please research and dont use peel & seal from HD, its asphalt/tar and not good for your general health.

Well, ok. NOT the same stuff, but still pretty effective- I've had no problems from it. I'll call you when I'm diagnosed with cancer though.

 

[SayNoToPistons]

 

[HelloMello]

NOT the same stuff, but still pretty effective

I agree it is very effective though I used it in a sealed sub enclosure I built for a friend 15 years ago, not an open cabin, and the stuff stinks. Amazing results that I wished I recorded that caused the roof to vibrate in wave like motion with only 2-12s @ 2x200rms. That was the best box I ever built including ported and multi-chambered band pass enclosures. Anyways like Hollis said, do not use it in the cabin.

 

[chriscabob]

Primarily dynamat/ sound dampers (deadeners) are to increase audio quality by retaining mid and low frequencies from escaping the thin structure of the vehicle shell. Per their instructions, you are suppose to use it sparingly and primarily near the speakers only.

Take a look at my tailgate pics, one has just sound damping material with about 50% coverage and another one has the same sound damping material but covered with sound absorbing material (had some extra under layment from floating flooring). I used the sound absorbing material in truck, rear fenders, and tailgate. Since its not waterproof, I avoided using it in the doors. There are better thick rubber material you stick on or spray on that could be used as you mentioned. In my case I over used the sound damping material in doors by so much that it greatly reduces outside noise. In the same affect, I had my radio near max and closed all the doors/windows then stood outside the car and it definitely reduced how much I heard.

I know this is an old thread, but I'm about to do dynamat in my doors and I've been asking in the radio/speakers thread. But feedback is differing some say to do outer shell of the door and another guy just went over the big black plastic piece... Do you have any pictures of the door with the black plastic piece removed and showing the access to dynamat the insides? Also was removing that big plastic chunk hard as you said it hold the window roller etc...

 

[Chris_Top_Her]

Actually, because of my sub I wouldn't mind doing this in the rear. I get a bad rattle that may be caused by the floor and exhaust shield, or the hatch itself on some songs. Luckily I have the amp knob within easy reach under the dash.

 

[hollis]

putting dynamat on the hard plastic inside doors in not advised. yes removing the hard plastic hold the motor for power windows and no its very easy to remove and re-assemble. as for pic, should be in the auto manual thread. remember dynamat is meant to make the door act like a speaker enclosure. helps prevent sound waves from escaping via sheet metal and big midbass increase. gl