The sound system as a home theater generally has at least 4 channels, which are left front, right front, left rear, and right rear channels. The better nature is 5 channels.
The five speakers form a surround speaker, which refers to the center channel, front left and right channels, rear left and right surround channels, and 0.1 channel subwoofer channels. The center channel speaker is responsible for regeneratively interacting with the action on the screen. Most of the time it is responsible for the dialogue of the characters; the front left and right channel speakers are used to compensate for movements outside the center of the screen or not visible from the screen. And other sounds; the surround sound speaker is responsible for the peripheral and the entire background music, making people feel in the center of the entire scene. A total of 6 speakers can be connected to a system. 5.1 channel has been widely used in various traditional theaters and home theaters. Some well-known sound recording compression formats, such as Dolby Digital and DTS, are based on 5.1 sound system. "0.1" channel is the subwoofer, also called subwoofer, subwoofer, the main purpose of the subwoofer function is to supplement the low frequency of the entire speaker system, is a specially designed subwoofer channel, this channel A subwoofer with a frequency response range of 20 to 120 Hz can be generated. The highest sound pressure level on the spot can reach 105dB, which can be said to be deafening. It can be said that the theater lacking a subwoofer is hard to say is complete.
Now the 7.1 system has appeared. It is based on 5.1 and adds two middle and left and right right pronunciation points in order to achieve a more perfect state. 7.1 The system cost is relatively high, so it cannot be widely used.
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