As the name implies, sound deadening mats are used to reduce the amount of outside noise that is able to enter the inside of a car. Common vehicular noises include wind and vehicle vibrations. These noises can range from a faint hum to a noisy rattling. For drivers who spend a considerable amount of time in their vehicles, background noise can be a major distraction.
Sound deadening mats are also known to improve the quality of a vehicle sound system. By isolating outside sound and creating a sound-canceling barrier, these mats can also improve the quality and range of sound produced inside of a vehicle. On top of that, sound deadening mats insulate against intensive cold and hot temperatures.