Benefits of Sound Deadening in Your Vehicle
Constraint-Layer Damping (CLD) or as it’s more commonly referred to as ‘Sound Deadener’ is a sticky butyl-rubber material with an aluminum backing that is rolled on, to adhere to the metal panels of the car. It works by changing the resonant frequency of the sheet metal. Let’s talk about why this is important.
Reduces Road Noise
Road noise is sound that makes its way into the cabin from outside the car. There are many ill byproducts of having excessive road noise. The droning of road noise can cause fatigue, similar to jetlag. It’s the main reason why you feel exhausted after a long road trip.
With excessive road noise, you and your passengers have to talk louder to be heard. When talking in a sound deadened car, you’ll be able to hear better and not talk as loud. The same applies to car phone conversations.
Less Resonance, Less Rattles
When a panel resonates it also vibrates, which can cause neighboring panels to touch causing them to rattle. Not only are rattles annoying, but they distract from the music, killing your stereo imaging and causing undesired localization.
Treated Cars Feel More Solid
Getting your car sound deadened is a smart way to get the feel of a more expensive car. Everything feels tighter and quieter because it is. No more tin can syndrome!
A Better, More Efficient, Acoustic Environment
A car door is far from an acoustically optimal place to mount and house a speaker. Ideally you want something well sealed with anechoic properties. By using sound deadener to seal up the gaping holes in the car doors, we can make them act more like an enclosure. This is crucial to achieving solid midbass from your speakers.
Sound deadening where the speaker mounts to, creates a solid baffle which is critical for performance as well. Deadening inside the door itself reduces resonance which negatively affects the speaker and causes distortion.
How does sound deadening make my stereo louder? It does this by lowering the ambient noise floor inside the car. In doing so, the stereo doesn’t have to work as hard to overcome the road noise.
Unrelated to sound, but a nice added benefit of sound deadening your vehicle is that it doubles as a thermal insulator. In the winter your car will stay warmer longer, and in the summer, it’ll help keep in the cool.