Sound Proofing: "Sound Proofing starts with some means of damping. A number of products are available for this, and they all have various degrees of effectiveness. The best results are always obtained from using a combination of these products. There are mats, sprays, foams, and insulation available from a number of manufacturers

Mats are usually either Styrene-Butyadine-Rubber or asphaltic sheets backed with an adhesive of some type (although other materials are used in some cases). Installing mats in your vehicle is a simple way to reduce vibration, and is effective as well. The way mats work is that they are used to cover panels. The material they are made of absorbs vibrations in the panels, and turns them into heat, or it may simply lower the resonant frequency of the panel. Mats can also be placed between panels to reduce the amount of vibration between the two panels when they are in close contact. Many times, the mats will also have a metal foil backing to improve the heat resistance of the matting (thus allowing you to use it in an engine compartment). The matting also adds weight to a panel, reducing it's tendency to vibrate in the first place. Some of the more popular mats are Dynamat and Road Kill, but there are alternatives. One of those alternatives is a material known as Ice-Guard. Ice Guard is normally used as a roofing material, but is essentially the same material as commercial mats, except that it incorporates an asphalt material for water proofing. Ice-Guard is much cheaper than the other commercial mats, up to 80% less. It has to be bought in large amounts, however, and minimum purchases are usually 80 to 100 dollars for an entire car, compared to $400 using Dynamat or Road Kill. Ice-Guard also has to be aired out for a couple of days after installation before you can put your interior back in, and it is recommended that"