As the question suggests, what can be the use of a four-door sound insulation of a few hundred dollars?Does it really reduce wind noise?Can it really improve the sound quality of the mid-woofer on the door?If you can really solve these two problems, why don't you give the original car directly?
A small question derives from a number of big questions, is this the rational consumption of the information age?
Let's talk about the hundreds of dollars for four-door sound insulation. Now on the market, the basic four-door sound insulation scheme (two layers) can be done for a few hundred dollars, and it is rare to have more than a thousand yuan. Therefore, it is more common for a basic four-door sound insulation scheme to be done for a few hundred dollars. If the four-door sound insulation of the basic scheme is more than three digits**, then the gold content of this sound insulation is very high.
Just a few hundred dollars of the basic version of the four-door sound insulation scheme, what effect can it have?Isn't it just a piece of this and a piece of that?
Generally, the double-layer door sound insulation, the inner side of the door sheet metal is pasted with a layer of sound insulation and vibration absorbing plate, and then on the bracket of the door sheet metal (that is, the sheet metal of the outer layer of the inner side of the door) is fully pasted with a layer of sound insulation and vibration blocking plate, a total of two layers of sound insulation and vibration insulation plate can enclose the cavity of the door sheet metal into a relatively closed box. Of course, the premise of this airtight box is that the construction process is professional and hardcore enough, and there is no quality bug in the soundproof product itself.
Such a cabinet, similar to the common speakers in daily life, of course, is certainly not as good as the professional speaker, but it is certainly several times better than the empty door panel of the original car. Compared with the original empty door, this quality-assured double-layer soundproof airtight box is of course more effective with the mid-woofer on the door.
This is where the sound insulation of the four doors comes into play for the acoustics.
In the case that the original door sheet metal does not have any sound insulation measures, at high speed, the wind resistance compresses the relatively thin sheet metal, which will produce low-frequency resonance and transmit to the car, thus forming a low-frequency noise that makes people feel dizzy, which is often referred to as wind noise.
The first layer of vibration absorbing plate affixed to the door sheet metal of the four-door sound insulation is the vibration suppression function as the name suggests. The vibration plate is attached to the sheet metal, which can enhance the rigidity of the sheet metal, so as to resist the strong pressure of the wind pressure on the door sheet metal at high speed, reduce the sheet metal resonance, and achieve the effect of reducing the low-frequency resonance. The second layer is the same reason, but the second layer has one more identity, which is the effect of box sealing.
This is where four-door soundproofing comes into play to reduce wind noise.
The basic four-door sound insulation with guaranteed quality of several hundred yuan can not only reduce noise, but also make the effect of the middle and low woofers more perfect, especially after upgrading the audio. For example, the following oneToyota Veranda made four-door two-layer German rainbow sound insulation
On the contrary, if there is no quality assurance of hundreds of four-door sound insulation, it is relying on the defense.
Finally, as the old saying goes, if you choose to do car sound insulation, please choose reliable sound insulation brand products, and choose reliable construction stores for installation to avoid falling into the pit.