How to forbide car noise

Car noise from four aspects, road noise in the car driving, comes from the friction with the car chassis of the car tire and road noise feedback from the road, this is the first serious solution to enchant four good tires more practical compared soundproof! 2 car moving from the body in the upper part of the wind noise, this is because the body is not completely smooth surface in the collision with the wind whistling noise plus body sealing solve this can only ask the depot, and you ask me White asked friends!
Door trim panel inner layer of the density high sound-absorbing cotton! This Department car I demolished many in Germany and Japan and South Korea, completely not this year, the Japan Department individual new car has been fitted with, but a very small piece of absolutely no A3 such a large area! This is a layer of real fire retardant sound-absorbing cotton, used to suck in addition to the role of noise! High cost of this stuff! Manufacturing process requires very top! Because this material is in previously not civil, but aviation material! Used in the aerospace field! Thin 3-5 mm cotton, stretching dozens of layers of honeycomb surface layer to expand!

    The effect is quite amazing! Recommends that owners even do vehicle soundproofing piece of cotton should be retained! The most soundproof brand this cotton sale!

    A3 is also the middle empty Besides German cars and American cars door is double steel and other cars are basically hollow! Most solid Volkswagen Bora, door called a thick ah! The demolition not good demolition! Fox also double steel door!

    The inside is black factory soundproofing glue, and afterloading difference is that the original is a hot melt pressure glue, heated, high-pressure adhesion at high resonance characteristics of the original car part! Extremely strong! There was a waste gate, I'm busy all right shovel glue Ins and Outs shovel more than half did not get clean! Seen how strong!
 
    Intermediate collision beam, very thick! Very large! The inner layer of paste domestic brand name Simon triple system vibration noise cotton inner layer damping plate, the outer layer of noise cotton! The door outer layer paste Leung's top the QD series damping board to prevent vibration of the speaker installation and door inner layer of iron plate!