Types of stage sound preparation for sound knowledge

　　Sound box also calls loudspeaker box, it is the device in the box that mounts loudspeaker unit, it is not pronunciation part, however display and the auxiliary sound part of rich bass. Basically CAN divide FOR 3 KINDS: ENCLOSED sound box, invert type sound box, labyrinth TYPE sound box. The sound box equipment is very conscious of the location factors given to it when the stage is built.

　　The kind of equipment of professional stage sound is very much, equipment of professional stage sound below general circumstance is by microphone + mixing station + power put + sound box can. In addition to the microphone, sometimes also need DVD, computer to play music, etc., can also use a computer. But if it is to professional stage sound effects, in addition to the need for professional stage construction staff, but also to add effect, timing device, equalizer, pressure limiting device and other sound equipment.

　　1, mixer: with a plurality of channel input, each channel sound can be processed separately, and has left, right channel, mixing, monitoring and other output of a sound mixing equipment. It is an important equipment for sound engineers, sound engineers and composers to create music and sound.

　　2, power amplifier: the audio voltage signal into a fixed power signal used to drive the speaker sound equipment. The matching condition of power amplifier power is the output impedance of power amplifier is equal to the impedance of loudspeaker load, and the output power of power amplifier matches the nominal power of loudspeaker.

　　3. Reverberator: in the sound system of dance hall and large stage lighting concert venue, a very important part is the reverberation treatment of human voice. After the PERSON'S song PASSES REVERBERATION processing, can PRODUCE THE aesthetic FEELING of a kind of electronic sound, MAKE the SONG DOES NOT HAVE one lasting appeal. It can cover up some defects in the voice of some amateur singers, such as hoarseness, guttural sounds and sharp vocal chords by reverberation processing, so that the sound is not so ugly. In addition, reverberation can make up for the lack of overtones in the timbre structure of amateur singers who have not received special vocal training. This is very important for the effect of stage lighting concert.

　　4, frequency divider: realize the frequency divider circuit or device called frequency divider. There are many kinds of frequency divider, according to the different waveform of its frequency signal, sinusoidal frequency and pulse frequency. Its basic role is, according to the requirements of the combined sound box, the full frequency band sound signal is divided into different frequency bands, so that the speaker unit to get the appropriate frequency band excitation signal, working in the * state.

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