Dynamat worth it ? - quoted $450 from audio shop

SouthArk370Z · 12-19-2014, 09:21 AM

Quote:

Originally Posted by AdamRacer

Has anyone just put a stuffed amount of acoustic foam in the rear hatch area underneath the carpet? Then possibly topped with a thicker carpet or closed cell foam mat on top to block road noise from back there?

I'm wondering if this would make a difference or not if it was filled/stuffed in the open areas underneath.

After I had the interior panels re-installed after installing the sound damping, but without spare/sub/carpet, the cabin was pretty noisy. The damping material helped a lot, but it was still noisier than no damping with spare/sub/carpet. Put everything back in the car and it was much quieter than without damping. So, yeah, I'd say that something like a thicker pad under the carpet would help.
You can install sound damping in the floor of the hatch area without doing any major dis-assembly of the interior. Should have the same (or better) effect than thicker pad/carpet. Covering the strut towers and wheel wells will do more good but you have to remove interior panels.

ScottIN is right about the back glass - great sound reflector. Nice if you have a Bose sub but terrible for road noise. Some internal louvers might help but there's not a lot you can do about it.

AdamRacer · 12-20-2014, 03:48 PM

Thanks! I think I'm going to try just to see if it'll help a little. I've kinda gotten used to the road noise until I drive another car lol..

Zipper 104 · 12-20-2014, 08:11 PM

I'm going to try to tackle over the winter.
I have NO experience with cars but worked building offices for years in buildings where we tried to keep noise from being transmitted to adjacent offices from audio/video/boardrooms, etc. Hence, I subscribe to the school that you use a layer of dampening material, a layer of close coupled foam, a layer of sound blocker and if you have the additional space, some sound absorber.
This is the site I found valuable.

Welcome to Sound Deadener Showdown | Sound Deadener Showdown

My intentions are to do my install following this guy's methods. It remains to be seen what room I will have on the sides of the hatch and the doors. I see no issues with the hatch floor.
It looks as though I need at least 3/8".....more would be a luxury. The layer of absorber may wind up being deleted on the hatch sides and doors.

104

12-20-2014, 08:11 PM	#3 (permalink)
Zipper 104 Enthusiast Member Join Date: Aug 2014 Location: Canada's Wet Coast Posts: 480 Drives: '13 PW/Frost/Spt/AT Rep Power: 12	This is something... I'm going to try to tackle over the winter. I have NO experience with cars but worked building offices for years in buildings where we tried to keep noise from being transmitted to adjacent offices from audio/video/boardrooms, etc. Hence, I subscribe to the school that you use a layer of dampening material, a layer of close coupled foam, a layer of sound blocker and if you have the additional space, some sound absorber. This is the site I found valuable. Welcome to Sound Deadener Showdown \| Sound Deadener Showdown My intentions are to do my install following this guy's methods. It remains to be seen what room I will have on the sides of the hatch and the doors. I see no issues with the hatch floor. It looks as though I need at least 3/8".....more would be a luxury. The layer of absorber may wind up being deleted on the hatch sides and doors. 104

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12-20-2014, 03:48 PM	#2 (permalink)
AdamRacer Enthusiast Member Join Date: Jan 2012 Location: North Florida Posts: 316 Drives: '12 MBlue 370z 6sp Rep Power: 15	Thanks! I think I'm going to try just to see if it'll help a little. I've kinda gotten used to the road noise until I drive another car lol..