Commodity code 
[sound insulation]Car sound engineering can be the engine noise, vibration, resonance, the door body when driving and road, air resistance generated by the friction sound, and effectively eliminate the barrier and give you a tranquil driving space, greatly improve the driving comfort.
[strengthening body]The machine body cover, door, reserve tank, roof, wing in non key parts of pull iron are relatively weak, equipped with soundproof material, body stronger, collision, passive safety coefficient is improved.
[optimization of sound effects]Sound, especially installed at the rear of the subwoofer, the trunk will lead to vibration, sound reduction, this is not done properly because of vibration, the structure of a car can not afford bass shock, a "squeak" sound. After the sound insulation construction, the body metal resonance is eliminated, and at the same time, the sound absorption effect is good, and the sound can be clearer, more vigorous and more vigorous.