Sound is a soul sound restoration system, sound box is a kind of hardware equipment is sound. Sound box is the component of sound, sound box is a kind of terminal equipment of sound. Car acoustics should have very good adaptive ability to temperature and humidity and shock absorbent effect, and all kinds of noise can affect the effect that loudspeaker plays. So first of all, what is the difference between sound and sound box? Here is a detailed introduction.

From the composition of sound and sound box can be seen: sound is a soul sound reduction system, sound box is a kind of hardware equipment is sound. Sound box is the component of sound, sound box is a kind of terminal equipment of sound.

Car acoustics to temperature and humidity and shock absorbent effect should have very good adaptive ability, still have all kinds of noise, such as road noise, tire noise, engine noise, wind noise and other noise sources, can affect the effect of loudspeaker play. Loudspeaker installation position, Angle and other problems, often can use glass fiber reinforced plastic die, leather and other processes. To ensure that the car after the modification of the sound of the beautiful and sound effect. Want to let the car audio equipment play due level, need good technology and connection safety. Car audio is a whole system, modification needs reasonable collocation and debugging, it is a system engineering with high technical gold content.


1、Prestage signal control
Before class signal control is the processing machine part of audio between sound source and power put, for example to the control of volume size, the adjustment of treble and bass, left and right balance, before and after volume adjustment, it is the part processed before power put.

2、Power amplifier
Power amplification is to amplify the sound intensity before the control, strengthen the success rate of the output of the organization, namely commonly known power amplifier.

3、The speaker
Loudspeaker The electrical energy into sound waves of the machine is called a loudspeaker, commonly known as the horn. According to acoustics principle, LET sound WAVE HAVE BETTER play, put loudspeaker in box unit, became sound box. In the car due to the space limitation, the horn is installed in the door, the door constitutes the box body.


4、Software and Media
Software and media is a way of audio source, can be CD, DVD, also can be SD card or radio, etc., need host to have this aspect of the hardware interface to support.

5、Audio source
Audio source is the organization that can decode software and multimedia, which can be understood as the audio signal after decoding software and media.

6、Transport agency
Transmission organization is a complete sound system, wire is indispensable component combination, but wire often is ignored easily however. For example, power supply, grounding, starting, signal, horn, optical fiber and wire needed for special systems are all different in design due to their different requirements. Whether the rationality of wire and installation technology are good, also can produce major effect to sound effect.

A speaker is a box with a horn. It is a kind of terminal equipment that transforms audio signal into sound, sound box is composed by 1. Loudspeaker 2. Box 3. Frequency divider consists of three parts.
1、The speaker
Loudspeaker has a variety of classification: according to its energy can be divided into electric type, electromagnetic type, piezoelectric type, digital type and so on; According to the diaphragm structure can be divided into single paper basin, composite paper basin, composite drum, coaxial and other kinds of; According to the beginning of the diaphragm can be divided into cone type, ball top type, plate type, belt type and so on; According to the replay frequency can be divided into high frequency, medium frequency, low frequency and full frequency band loudspeaker; According to the form of magnetic circuit, it can be divided into external magnetic type, internal magnetic type, double magnetic circuit type and shield type, etc. According to the magnetic circuit properties can be divided into ferrite magnet, neodymium boron magnet, aluminum nickel cobalt magnet loudspeaker; According to the diaphragm material can be divided into paper and non-paper basin loudspeaker.

2、enclosure
The box is used to eliminate the acoustic short circuit of the loudspeaker unit, suppress its acoustic resonance, broaden its frequency response range, and reduce distortion. The box SHAPE WITH CAR sound BOX COMMON HAS SQUARE AND trapezoid TO WAIT, DIVIDE BY THE STRUCTURE INSIDE BOX BOX TO HAVE CLOSE AGAIN, INVERTED PHASE TYPE, BELT TO WAIT.

3、divider
Frequency divider has power frequency divider and electronic frequency divider, the main functions are frequency band segmentation, amplitude frequency characteristics and phase frequency characteristics correction, impedance compensation and attenuation.

The frequency divider can divide two - frequency, three - frequency and four - frequency according to frequency segment. Dichotomous frequency is to divide the whole frequency band of audio signal into high frequency band and low frequency band. Tri frequency is to divide the whole frequency band into three frequency bands: high frequency, medium frequency and low frequency. The quartile frequency divides the tripartite frequency into an ultra-low frequency band.


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