Feedback suppressor of Whistler active suppression and passive restraint?

In sound reinforcement system feedback of excessive performance is Whistler, is the microphone audio gain elevation limit performance, is the result of peak overlay. In response to this phenomenon, it proposed a variety of enhanced microphone audio gain methods such as reasonable sound field layout, additional sound absorbing materials, changing sound reflection characteristics and so on physical means to avoid this kind of phenomenon from occurring, meet the functional needs of sound reinforcement of sound pressure. Through electroacoustic device compensation means to achieve improved microphone audio gain goal is also often used. Electroacoustic device compensation means also divided into active mode and passive mode. Shift is a typical active suppression tool, how it works is the audio signal through the shift change in original frequency (entered in Hz signal is 1K, out of the signal is 995Hz) and thus destroyed the peak overlay, so that the frequency response curve tends to flat sound reinforcement system get higher average audio gain microphone margin space to ensure that the initiative of the whistle. Equalizer for feedback control first is found high frequency response curve, through the bumps on the point of control is to be balanced frequency response curve, making sound reinforcement system for maximum audio gain space (-6db). Feedback suppressor works is an automatic equalizer. So said the equalizer and feedback suppressor for live sound reinforcement environment belong to passive feedback inhibition. L audio microphone gain enhancement processor built two feedback inhibition, a pressure point (parametric equalization), second shift. Is ascending tone microphone gain enhancement processor in KTV, conferences, and other environments can be used by very positive recognition, there are two reasons. 1. in the current environment for sound reinforcement feedback suppressor in the l sound microphone gain enhancement processor is the most complete, additional control measures to not mention. It has proactively inhibits (shift) and passive restraint (parametric equalization) means. When the access is most of the environment without debugging you can easily reach the singing, speech, the purpose of the prevention of Whistler. The system's audio gain new skills, the l sound microphone gain upgrade the processor to raise 3-8db. While traditional feedback suppressor can only raise 2-6db and complex debugging. Normal singing of tone: microphone gain enhancement processor almost no aural distortion. General feedback suppressor in automatic mode pressure point range constant-9db will cause great aural distortion. For reasons of speed, a lot of feedback suppressor produces sound lag phenomena. II. is the interface issues, regular feedback suppressor only line interface, many card package amplifier does not have the phone line access point. To give feedback suppression processing start, which caused a general feedback suppressor is not available in this type of environment.