Not sure where to post this, but I hope y'all don't mind.

Yesterday afternoon, i drove an FD2.0 (7mths old) using Michelin PP tyres. Owned by a non-enthusiast guy, and of course, it was virtually std.

On the various highways that i drove it on, I noticed a very noticeable lack of windnoise vs the other FDs I've been driving nearly daily. To re-compare, I drove a std FD (9mths old) on the same stretch of highway last night at the same speed 140kmh. The 1st FD was definitely quieter in terms of wind noise. Also, while idling, less external noise seemed to intrude into the cabin.

The owner of the 1st FD bought the car 2nd hand from a jewellery company, and the only thing that was done to it previously was tinting by Llumar, and it's called Palladium or something like that. That film appeared to be very thick, and its some sort of security film I think. Maybe to protect the jewellery from being snatched

On this FD, I can confirm that the windnoise at high speeds was noticeably and significantly less than a regular FD. Curious, I asked around and found out something interesting from someone working in the automotive glass mfg industry.

On new cars, we all know there's lots of glass surfaces.
It's confirmed that glass
1. will allow noise to pass through it
2. will resonate due to external noise, and hence transmit some sort of noise into the cabin.

So, regardless of how much damping materials you use, external noise still enter the cabin via the huge expanse of glass surfaces. You can still hear whats goin on outside. The door seals and window seals also play a part.

The latest Merc EClass's laminated windscreen will also hv some additional sort of plastic film bonded to it with the specific purpose to reduce windnoise and general NVH, as the wind slams onto the windscreen at highspeeds. Mftrs acknowledge that the usage of new materials attached to the glass can reduce 3-6db of noise transmission.

So, if the FD's glass cannot be upgraded. attaching a thick/dense film to the windscreen and other glass surfaces might make some sense. Since the tint is so thick, it might give a tighter seal between door window and the seal, reducing the ingress of wind noise. On the windscreen, the thick film might act as some sort of dynamat thingy to reduce the resonance of the windscreen as oncoming wind slams onto it. It's not 100% but still...better than nothing.

Interesting... What do you guys think??
Anyone heard of these ultra thick Llumar films? Sorry ...I am not a pro when it comes to tint materials.

It does make sense, Albert.

To me, I personally feel that the FD wind noise is acceptable. But not the road noise (tyres) and the earth quake kind of sound effect when roll over the uneven road. I am not too demanding but it just.......unbelievable for a Rm130k japanese car

Try soundproof your front mudguard areas.
It helps a lot in reducing the road noise in my CM5.

Hey Albert, I think attaching a thick security film to the front windscreen is not an option. Four the four side windows and rear is still acceptable. But the thing about tint is that when a thick film ie >1.5mm is attached to a big piece of glass, heat will cause the tint to smear your vision.

This is through personal experience as the thick film I used for my front windscreen (1.5mm) has already showed signs of wrinkling and is impairing my vision at night because of the waviness.

I do agree on the sides and rear though, but please do not try security film on the front winscreen for safety purposes. Sometimes the glass NEEDS to be broken.

if u see nicely on the main windscreen - there is some waviness even in Vkool and Wingard as i am using both, i believe as the thickness goes up ... the vision may be slightly impaired.

if something can be applied outside (other than a regular tint) perhaps it could work? any ideas from the rest ?

The glass mftrg person told me that laminated glass can help reduce transmission of noise thru the glass. It's not only for safety reasons. The middle layer of the lamin. glass (the plastic layer) is critical and lots of mftrs of this middle part have introduced new high-tech materials that can strengthen and reduce noise transmission by as much as 6dB!!

While most new, super premium cars have laminated glass on the front and sides, the side glass on FDs are the normal type I believe. (weight savings, cost savings etc).

It seems there's no such thing as switching to laminated glass for the FD's side glass.

So it looks like, there's a potentially new area for enterprising Msians to look into...offering laminated glass for the sides of the FD, where the middle layer of plastic is the new-gen type (such as SaFlex) that helps strengthen as well as reduce transmission of noise. Sounds easy...but as usual, who wants to spend the money on mold-making etc etc

If the glass areas are "treated" in some way, coupled with Dynamat etc etc + autofoam + wheelwell dampening...then I finally believe, there'll be a siginifcantly and justifiable sound-damping effect on the FD, cos whatever areas than can be controlled, have been attended to.

Today, AutoGadget in PJ showed me a Llumar pricelist for some kinda security film of 6mil thickness, and if I'm not mistaken, it's around RM4.4K...

Most of the time, the loudest of cabin sound (wind) comes from the side windows .. I do not ordinarily hear as much sound from the windscreen compared to the side window. The noticable sound from the windscreen is the whilsteling sound that is only present at very high speeds... and I suspect that that comes from the wipers.

4.4K is for whole car is it? That's really pricy. How much for just the side windows? Back windscreen can also ignore I suppose as we don't drive fast in reverse ... and even if we do, not for long distances

everyone here is right - for my car ... i have sound proofed almost every portion ... from the wheel arch, to the undercarriage, to the floor panel, boot, mudguard, fender, A Pillar, B pillar ....

only 2 areas left untouched .... the front windscreen .... and the door inner panels ... and tyres ...

is it because that the angle of the main windscreen is positioned in the civic, it has more contact than the average windscreen of other makes?