if your car is a charade. sound deadening would not help in killing the sound you hear.

the design of the charade,and cabin is full of opening where sound or air can get into the cabin.

if it has something to do with your tires, its even much worst. theres a opening from the wheel wells that is located near your door hinge. the only thing that separates you and the tires through that opening is the rubber that arches along the wheel well.

applying flashband would not help unless you plug that hole with flashband. save yourself 3k or so by not applying flashband on the doors, cabin floor etc etc

I should know, i have done the same thing on the same car sometime ago.