Im having problem with road noise, I can't enjoy my SQ system on the road, I only enjoyed the system when the car stops which is very annoying.

I went to Northfield mooroka and they said putting Road Kill / Dynamat / anything like it will not make any difference, because its not sealing the noise, its just to improve your Midrange sound.and it is very expensive to install. I believe by putting dynamat on the floor will reduce the noise but it will also hurt my pocket sooooo bad, like $4000 which is about 1/3 of my car price ----- not worthed

the recommendation is to spray the car underneath with some kind of " TAR / ASPHALT " (black colour normally), but I never know where to do it , how much it is gonna cost me and is it gonna work?

other recommendation is changing the tyre, well I tried it and its no different at all, I realise the problem isn't on the tyre but the lack of sound deadening on the car itself

is anyone here has any idea?

Im in Brisbane and my car is CIVIC Vi hatch 2002

putting dynamat in the floor cost 4000?? wtf, well putting dynamat in the whole car doesn't realy reduce road noise, my fren have accord 94, he put dynamat extreme in the whole car , (the whole floor,all door, the whole boot, but not the roof though),cost him around 6 bulk pack, and also put dynamat hoot liner , and yet only decrease a bit road noise, it can't be cure by using dynamat.

change your car to s-class, u wont heard road noise , as my friend did

put s/d on the wheel arches
front and back and cover that with sound underlay then with the carpet

because your wheels are in the same cabin space
thats why you will have these problems

i purchased some K+H Spray on undercar deadner, sprayed it in the wheel arches of my old magna, was impressed. Cost around $10-$12 a can.
Will be doing the same to the mirage soon.
Most automotive stores stock it, i got mine from autobarn when they had a big sale on, cost like $8 or $9 i think.

The entire underside of my car is sprayed with deadener from factory, yet it still has quite annoying road noise. Ive also gone through a large amount of dynamat extreme trying to combat this, and I did notice a minor improvement when I did the boot.

Personally, I think its my tyres that are causing the noise. Some tyres should be better than others for a quiet ride. This is what I am going to look into next, else just buy a new car like a BMW or something

It's likely tyres are definitely contributing. I can recommend Goodyear Eagle F1 GSD3's. Low noise (no real 'hum' or 'roar'), lasting really well and are nice and grippy in both wet and dry conditions. I think the've won an award or two as well...

Edit: Japanese cars tend to skimp on sound deadening to keep the weight down. Can you find out where the noise is coming from? Is it the wheel wells? Underneath the car? Through the doors? What kind of noise is it - i.e. is it wind noise, road noise (tyre roar), etc.?
My brother has used the bitumen based sound deadener in the wheel wells of his (now sold) Subary Liberty and said it was a noticible improvement. But he had Bridgestone Potenza's on there which are notoriously loud. Perhaps a combination of this and some internal deadener like Dynamat might yeild some decent results?

I use Dynamat Extreme on my door and i can safely say that my car beat E class on term of noise supression during highway driving (better tyre will give less noise as well), i have 19 inch tyre as well, i also deaden the spare wheel well area.
4g?? not sure where he get that figure from but I order 90+ sgft of SD for 300+ bucks and it's not an asphalt based but butyl based (Dynamat Extreme is butyl based as well), as for installation it's very easy just need some willingness and u'll be set. Civic interior is very easy to disasemble, we've done it in to my cousins car and yes we saw very little of SD, compare to say a Toyota Camry.

The noise level varies significantly across different tyres. Quiet tyres usually have small block tread pattern.

My car is a TF Magna which already has factory SD material on most of the floor pan howerver I still found it noisy. I started with two layers of Flashtac on the entire car (door, floorpan and boot) - no or minimal difference. Then I added a layer of carpet underfelt - very small difference. Finally I put corrugated cardboard from TV/stereo/PC packaging under the carpet and the improvement is very noticable! I will definitely recommend you to try it since it is free and doesn't add much weight to your car.

I would be concern putting cardboard on the door, since it absorb water but on the boot and floor sounds like a good idea, besides carboard is free from bunning . Flashtac or Jaycar is very 'limpy' compare to Dynamat Extreme and may explain the performance (they are asphalt based), but something is better than nothing. I tried Jaycar on my bootlid and does fairly good job reducing the panel flexing.

Arrgh I didn't make it clear enough. Yeah the cardboard and carpet unerfelt are used for the floor pan only, not in the doors! It is mainly to block and reflect tyre noise instead of stopping panel flexing.

If you go to clark rubber I think there is an accoustic deadening foam. This added to a layer of sound deadening like Dynamat extreme will work wonders. Also make sure that you fill all service holes etc and I think that should help

Forgot to mention I have tried closed cell foam too. From my experience corrugated cardboard is still more effective.

You can do a simple test to find out the sound blocking property of various materials. Tune your radio to noise and equalise it to simulate tyre noise. Cover the speaker with a piece of SD material and listen to how much is attenuated.

May explain the cardboard like material (much harder and stiffer) on the back of my door trim, maybe merc has notice this property and use it on their car.

Not quite the same....road noise can be transmitted through the suspension components, as well as by vibrating the sheet metal...

but hey, its a good enough thing to try

Not sure if you have noticed, not sure if all euro cars are similar but i know my friends Alfa has like a false grass type carpet lining all the wheel wells to reduce noise and they are fairly quiet on the inside.

Mine doesn't, but BMW has a very thick wheel well and quite solid compare to Merc. The car that take the cake on term of quitness is Lexus LS430, i would like to see what sort of SD/Sound barrier they use.

From memory, the lexus actually has two firewalls between you and the engine.

Whats in between the firewalls? Very heavy sand. Heard a few stories of people going to drill a hole through the firewall, and watching in horror as a crapeload of sand pours out.

Not sure if its lexus or one of the other marques, though.

Im getting more work done to my car soon at FHRX. Sound deadening the floor and second layer on doors, will put 2 layers on front seat floor and as high on firewall as i can get from the cabin.. whats the best spray for inside the tyrewell? anyone notice a difference with doing the roof? i got a wagon if you didnt know..

I asked that roof question quite a bit, and the response is usually "you notice when its raining", and "It doesnt flex on bass beats anymore".

what about the paint on products that claim to convert the sound to heat?
Any one used these with sucess?

Aust product Soundoff
http://www.soundoff.com.au/index.php?s=con...=product_orDmCm

or B Quiet from the USA
http://www.b-quiet.com/index.html

My car [928S4] has LOTS of road noise. Tyres make a big difference but I need to reduce the noise before I start upgrading the stereo. Some US owners have had success in the rear wheel arches and doors making a big difference

Nigel

http://www.sounddeadenershowdown.com/ ----> go there for SD comparison. I think B-Quiet product are covered in that review. As for the paintable one, i prefer sheet product, much faster (no need to dry) and easier to apply.

you may find a little useful info here

http://forums.nzicemag.co.nz/viewtopic.php?t=6949

Car Stereo review ran an article on this about 10 years ago and their results showed that even with two layers of sound deadening in the car it made at the most 2db improvement on grooved concrete and about 1.5 on normal bitumen.

Buy an old LS400 and be done with, just don't let the sand out of the firewall!

is that a black sticky spray? when it dried up it becomes like kind of rubber, yeh I used it just recently. I sprayed my wheel arches but don't feel much difference, I'd like to spray the door too but its too difficult to reach

thanks for the suggestion





s/d ?, is that Sound Deadening? which part should I cover ? and with what material? I wish someone can show me exactly the X-Spot.

anyway you sugesstion is very helpful, I'll try something out

thanks




I used Bridgestone Potenza RE88, don't really know if that the main cause of noise, its a stock tyre from factory.

the noise I heard is defenately road noise because it changes in different road surface, on the smooth surface it will sound like hhhrrrrrrrrr , and on the rough it sounds like grrhhmmmmmmmm, hahaha I don't know how to say how it sounds exactly, but it is defenately road noise

what is a wheel well, and where is it locate, what kind of deadener you using?


thanks a lot

How to Kill road noise?

Don't drive.

i've used bitumen on mine, but not the spray, turn out too expensive. i bought a can from bunnings turns out cheaper and you get alot of it. i bought 2 cans (1l per can) and did pretty much the whole underneath of car and can hear quite a difference. But tires do make alot difference

DIANCUK:
dude.. I know road noise is really buggin you.. and it will keep buggin you all the way.. coz no matter what.. civic is still a civic.. honda didn't built this car to be "extremely" quiet like.. let say.. S class??
I don't think it's gonna be really worth it to put sound deadening all around the interior.. as the labour cost would be so high... and by the end.. when you sell the car.. it's just gonna be another normal civic with no added value.. except if you are into the competition.. then money talks...

And.. could you please find my allen key in the garage if you happen to be flying down to melbourne??

do you have to take the car tyre off to spray that stuff? in my lancer, it would be pretty hard to reach the area behind the wheel. i can see the stuff going everywhere. including the suspension

yep. Have to take the wheel off, and clean everything THOROUGHLY.

suspension no bigge. Put garbage bags around it and duct tape it sealed.

Please don't make unecessary Post

Thanks





Co3nA :

I wish I could find your thing, I'll dumb everything that are not mine in the Bin soon, so you better be quick or I can't help you anymore. and Im not going to Melb just to give that thing to you....... what about pay my ticket