How Vital Is Sound Dampening A Car

[jrjoz]

Hey guys,

I'm in the middle of treating a 2009 FG XR6 Ute, I run an audio production company so have made a bit of a project out of this.

Basically with any sound system be it a recording studio or live venue you get a much better result if you treat the space.

I will be writing a full report on how it all goes but so far with the rear wall of the ute treated I have already knock 5dB of road noise out of the cabin.

Also any cavity you put a speaker in needs to be treated to stop resonance of a panel creating phase issues, basically if you do take the time to treat your door and large panels the louder and cleaner your system will be.

I have just finished both doors today so will re test and see how much quieter the cabin now is.

Here is how far sound treatment can go also this channel has some great advice on the mis conceptions of car audio

http://www.youtube.com/watch?v=qrk507bSnWE&feature=relmfu

Below is the treatment of the rear wall, single layer of dynamat all over, all holes filled and sealed, second sheet in the center of the panel then a 50mm layer of dynaliner. This has made the rear wall no longer sound like a rattling steel drum.

If you want anymore info feel free to PM me.

As mentioned above, Tyres are the biggest issue with road noise!

Edited 07/07/12 06:38 AM by jrjoz

[mcinnes]

Thanks guys All the input has been great. I just bought wheels and coil overs for my G6ET so wont e doing the audio for about 3 months. But the input has been great thanks

[bjc]

jrjoz,

If your ute is similar to the BA then the pockets where the rear speakers are were the worst for noise entering the cabin! I ended up with sound deadener then a big panel of 18mm mdf that was glued and sicaflexed as best as I could do in there to get rid of as much noise as possible. I did have plans to fit rear speakers but its a ute so didn't bother and I was very happy in the end, mind you my ute was a blown v8 with twin 3in system so when driving it was only a positive when at cruising speeds, lol

p.s. Keep the pics coming...

Edited 07/07/12 09:12 AM by bjc

[jrjoz]

Yeah I took a bit of time on those rear pockets, layer of dynamat then also used 50mm Acousisorb 3 which is a noise insulation I use on venues.

I also filled the channel behind the seat belt as that led straight to the outer panels.

Did the doors last week but waiting for a dry day to re measure the cabin noise,even the standard stereo is sounding pretty good now.

Cheers,

Jason