Generally, when we go to modify the car audio, we always see the masters measuring the quantity, measuring and measuring, installation and debugging are very particular. Why is this? Because compared with the general concert hall, the car compartment is small, and there are many factors affecting the sound quality, thus forming a problem that the car audio must be overcome. The main factors affecting the car audio quality are as follows:
1. The standing wave affects the standing wave, which is the sound caused by the reflection of the wall of the listening environment. When it is transmitted to the wall through the air, it will be reflected back. The sound of the sound of some frequencies is exactly the same direction as the source sound. The sound of this frequency becomes larger, and the opposite sound is weakened. Almost any room has a standing wave problem, but the degree is light and heavy, which is the main reason for the deterioration of sound quality.
In a space as large as a concert hall, the standing wave is generally generated below 100 Hz, but in the car, 100 Hz or more is also disturbed by standing waves. In the main case, it is a test of the technology of the installation master. By reasonable installation, the interference caused by the standing wave is avoided as much as possible, and the interference is minimized. This is the original intention of installing the car audio.
Second, the reflection of interference in the environment of the car, due to the influence of reflected waves, from the intermediate frequency to the high frequency, easy to produce direct interference of direct sound and pre-reflected sound, in the frequency characteristics, will produce a lot of peaks and valleys, this is The main cause of the decline in sound quality. Compared with the concert hall, the listening position and the speaker in the car are too close to the body, and it is easy to form a strong reflected wave, which causes the distortion of the listening. So the location of each speaker is very elegant.
Third, the reverberation time is short. The reverberation time of the concert hall is 300-500ms, and the concert hall is longer, reaching 500-2000ms, which forms the sound field unique to the concert hall. However, in the compartment, due to the small space, the reverberation is mainly composed of direct and low-frequency scattered resonance sounds. The reverberation time is very short, only 100ms, so the installation requirements are more demanding.
Fourth, the asymmetric listening position In the car environment, due to the serious edge of the listening position, it is difficult to obtain a perfect stereo effect. Since the distance between the left and right speakers is different from the driving position, strict adjustment must be performed before a relatively balanced hearing effect can be obtained. Usually, in the DSP processor of the car audio, the technicians can handle different delays of the left and right sound fields. Achieve this effect.
Many times, we will listen to friends and say that the chef of this store is very powerful. I will change it after three times. Or, the master of the store modified the sound really slow, and did not get it for hours. In fact, slow work out, installation and commissioning in the car audio is always more important than the equipment, so, do not map fast.
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