There are a few things you can do to remove sound deadening from a car. The first is to remove the seats and floor mats. This will allow the air to circulate and will help reduce the amount of sound that is heard inside the car. The second is to clean the interior surfaces of the car. This will remove any built up dust and debris that may have been causing the noise. Finally, you can use a vacuum cleaner and bucket to clean all of the surfaces in your car.
