Driving around the northbay today and realized that there was a lot of noise being generated from my exhaust. It's no more than usual... but I got to thinking.

Would it be worth while to lay down some Dynomat JUST in the trunk of my wagon? Think it's worth the money just to do the trunk and not pull everything from my car and lay it down thoughout?

I'd appreciate any thoughts.

Stan

 

Press the volume + button, way cheaper mate.

Mike

 

lol exactly...

 

not really...

sound will leak into the cabin in various places.

either live with it (via mike'sadvice) or do the whole car...

as per article i read around the mid 90s when dynamating was just getting into the car audio scene, one thing is to overlap the seams of each dynamat, since any small breaks can make the whole thing useless...

 

Werd me and a friend are thinking about doing that to our cars but we aren't looking forward to striping everything down. We even want to do the roof of the cars as well, leave no stone unturned. I think it would be worth it though silence is bliss!

 

well if you want silence, then you really have to do that.

strip and slap some sort of dynamat device all over.

think about it for a second.

you are trying to do 2 things: silencing and making the panels as "dead" as possible.

you know why vehicles from the 70s and older have such a nice THUD to it when you close the doors?

because the doors were thicker as they are now.

you can make the panels sound dead by 2 ways:

1. changing the material to change the resonant (vibating) frequency. sure, making door panels out of LEAD will have a great affects but...

again back in mid 90's, CAR AUDIO & ELECTRONICs magazine did a feature on mercury cougar where a dude make his subwoofer enclosure out of CONCRETE... yes it was very "dead' but we all know what happens when you add a few hundred pounds of concrete in your car...

2. add something to the material to change the resonant freq... that's why dynamat did and well... the rest is history.

one really trick and expensive way to silence the cabin is to use an active noise cancelling device.

you need a microphone and a device to make a 180 degree opposite soundwave to cancel the noise... that's what BOSE is doing with it's sound cancelling headsets... but like i said... practical? sure... expensive? duh...

good luck on your project...

 

OK, I can strip the entire interior out of my car and lay down some dynomat to every square inch of my car. But my question is this,

1) With the least amount of effort and materials, if I were to apply dynomat JUST to the trunk of my wagon, should I be able to noticeably REDUCE the amount of noise coming from my my exhaust?

2) Is it WORTH just doing the trunk?


The sound cancelling technology is pretty cool, but I don't think it has reached the level to where it will silence the complaints coming from the passenger side of the car.

 

I have one of those to mate, try headphones.

Also find them to act like a speed governer as well.

Mike

 

1) Noticebly yes. Enough to make it worth it, no.
2) Not to reduce exhaust noise. You'll need to do more of the car.

 

Most of the road noise is comming from the doors and the trunk. If you did both of those you should have a quieter cabin. I don't think you would notice much of a difference only doing the trunk. Also, I would get the dynamat extreme. It is lighter and gets rid of more noise than the original stuff.

 

Or you could get something even cheaper like Raammat. Equally effectve, and FAR cheaper.

 

even cheaper is roofing material.

BYO adhesive. just prepare for the smell.

early 90s, i was helping a dude lay down this stuff in his doors. cant forget the smell though...

lol....

 

I used fatmat in the trunk of my wagon, found little benefit. Added fatmat to the doors (interior and under the doorpanels) and under-seat area. This helps a great deal . Added benefit is that the stereo sound from the door speakers is much better.

fwiw fatmat = far less xpensive than dynamat extreme. Much better than cheaper and smellier alternatives.