[shrivz]

this foam is used by automotive manufacturers as OE damping material in the pillars, roof etc.
actually this particular one is denser than what the OEMs use.

My theory is that the rubber will act as a stiffening material and the foam will to some extent absorb sound.

anyways, its a DIY, so what the heck, if I fail, I'll rip it apart and just use the rubber.. moreover its the learning that is more important to me.

Update1:
I've already installed it in the front right door (only the innermost part as of now) and there's a lot of difference.. switched the balance to the right and boy! all the minor rattles are gone, the mid-bass sounds much sweeter. Its too hot right now, will finish the door in the evening.

I also did the knock test on the doors and boy very similar results as i had observed on Sam's verna.

Overall, I'm really satisfied with the material. Now only time will tell whether the foam was a good idea or not.

cheers!