Sound Deadening

[aah00n]

I have just found out about sound deadening.... How important is it to sound deaden the front doors...? will it make a huge difference or not?

[Trav33]

I've been told it will make a MASSIVE difference, and am about to sound-deaden my doors and install new splits. Have also seen some sort of sound-deadening sheeting, looks like a foam, which i think is meant to go behind the speaker.

[raz0r$harP.UK]

I've been told it will make a MASSIVE difference, and am about to sound-deaden my doors and install new splits. Have also seen some sort of sound-deadening sheeting, looks like a foam, which i think is meant to go behind the speaker.

I believe you are referring to a diffuser mat.

aah00n if you want your car to sound good, get the deadening. Doesn't even have to be the whole door - I only had the forward half of my doors deadened and it made a significant improvement.

[Chris Rogers]

now I've started something

it makes a huge difference. camera isnt here but I'll show you a 33 door (beofre and after) when I find my camera.

the whole idea is to make the door as acoustically dead as possible (there is a LOT of tech to this but that is the gist of it,.) so you have almost zero refelctions and cancelation.

the foam stops the reflections the sound deadening stops the panels from moving by adding weight. the result is better sound and a quieter car when the music is off.

[Adelaideprosound]

Dont forget to add, that deadening the inner skin, separates the back speaker movement sound waves from the front there fore eliminating mid cancellation, and improving midbass ten fold .

The Dynaxorb diffuser mats have specific ridges which disperse the backwaves and stop them from bouncing back onto the speaker cone, therefore improving power handling and less distortion.

George

Adelaide Pro Sound

Edited January 12, 2007 by Adelaideprosound

[clemmyb]

Old post, see if someone notices it...

If I get my doors deadened, and the diffuser mat placed in, then change my door speakers later does the diffuser mat have to removed/reglued etc?

Does it connect to the speaker, or just go straight onto the door, moulded to the speaker depth etc?

Thanks...

[Fujiwara]

sticks onto the door mate.

Just change the speakers when u need to.

[skybarge]

yeah man as above fully worth it

Get some dynamat extreme or b-quiet

then put a layer behind where the speaker sits, then rip off the factory plastic, get all th sticky stuff off with meths

then cover the whole door, all the wholes, cut out the part where the speaker will go(cut it in triangles from the inside of the circle, so not just cutting round it, so make about 10 cuts from the centre to the outer diameter of the speaker

You'll be left with triangle strips, leave those in, put the speaker in and you'll really really notice the different

I'll try get pics too

[rocketboy]

Here are some pics of mine. I used mostly Bostik, but will be striping this back and using all Dynamat Extreme in the near future. SDing your ride will make a significant difference, I did the boot when it was striped out and it made a huge difference to quietening the exhaust.

And this is the FG weather/water shield I made to protect the speaker. It's covered in DME.

So you can see the inner and outer skins are done, I went so far as to wrap the side intrusion beams! The bostik is very easy to work with, you just heat up the panels (they are 500mmx500mm) and the become soft and easy to mould to panels. Similar to DM, you just peel backing of to expose a sticky side.

Hope this helps, and sorry about the phone pics, I didn't have a digi cam when I did the SDing.

Edited August 17, 2007 by rocketboy

[tak]

i've bought sound deadening sheet from Jaycar only $26.

size is 330mm x 330mm

worth to buy......

[EvilINGT]

Just did my parcel shelf today with Dynamat, all the rattles and squeaks are gone , One wedge pack managed to do most of it, i didnt cover every single part of the shelf, but will when i get some more Dynamat. There was some left over but im about to tackle my front doors, so i dont want to run out and the odd shapes might come in handy. Should of taken a pic, will post it up when i move my splits to the rear and put my new ones in the front.

cheers

Evil

[Fry_33]

I did my doors a while ago now and it is great. It dropped out a fair bit of cabin noise and I have only done the doors. I probably went a little overboard but oh well. I want to do pieces of my rear parcel shelf and a bit on the inside of some of the flatter panels of the car at the rear.

Pics of what I did with my doors

[VSPEC32]

Here's a few blog posts covering the bits of the car I've dynamatted:

http://www.sillbeer.com/2007/04/blow-off-v...nd-dynamat.html

http://www.sillbeer.com/2007/05/wired-for-sound.html

http://www.sillbeer.com/2007/05/please-be-...in-comfort.html

http://www.sillbeer.com/2007/06/dynamat-done-and-pumped.html

Used all up about 3 and half boxes weighing in at about 10kg per box.

Cheers

Brendan

[some_cs_student]

I assume you've read the sticky topic in this forum on speaker install?

http://www.skylinesaustralia.com/forums/in...howtopic=164820

Its shows hot to install speaks with sound deadener

[dangerous_daveo]

I've had it all done too. Acess holes filled in with aluminium sheet, then that covered with dynamat. Those pads behind the speakers. Then the foam on the door cards as well to stop them rattleing, and to kill a bit more noise.

To say the least it made a HUGE difference. Mid bass was increased, road noise was reduced. The doors now also make that nice thud noise when they close. Which is just a perk I guess.

[GTRBOYZ]

Sound Deadener = Weight..............kg

I prefer power to weight but that just me xD

[sigsputnik]

^^^ "eat less kebabs".

our audi goes ferocious and it's deadened out the ying yang.

[wolverine]

the weight of a GTR is not a factor??

4kg's in the doors isn't exactly performance sapping.