【 Weak current College 】 what is compression limiters---Power By 【 China power house network 】

Compression limiter is a compressor and limiter. It is an audio signal processing devices, you can connect the audio signal of dynamic compression or restrictions. Compressor for variable gain amplifier, its magnification (gain) can be input signal intensity and automatically change is inversely. When the input signal reaches a certain level (threshold or threshold), the output signal with the input signal increases, a condition known as compression (Compressor); no longer increase is called limit (Limiter). Past press adopts hard turning point (Hard-knee) technology, the input signal is a threshold value. Gain on the reduction, which immediately appears on the signal in the corner (gain change turning points) dynamic mutations in the human ear clearly feel a sudden strong signal is compressed. In order to address this deficiency, the modern novel from the compression device incorporates a soft corner (soft-knee) technology, the compressor in the compresses better than before and after the threshold is a balance, a gradient, change the compression, the sound quality is difficult to detect.

The compression used in the recording process to make musical instruments and singing to maintain a certain balance volume; ensure a balanced variety of signal strength. Sometimes also used to eliminate the singers ' articulate sounds, or by changing the compression and release time, produce sound by the small size of the "reverse sound" special effects.

In the broadcasting system is used to compress a large dynamic range of signal modulation in the prevention of distortion and prevent transmitter overload, increase average emission level.

In sound reinforcement system and dance hall, the compressor is the signal through the compressed while maintaining the original program appearance, reduce the dynamics of the music, to satisfy the amplification system and artistic activities.

Although compressor for a variety of purposes, the modern compressor ordinary adopts new technologies such as soft corner, can further reduce the compressor for the side effects of compressor, but does not mean that the compressor is the destructive effect of the sound quality is lost. Therefore, in sound reinforcement systems, not to abuse the compression, even if you want to use and should be used sparingly to reduce compressor for signal processing. This is not only protect the power amplifier, speakers, but also to improve the sound quality.