【 Weak current College 】 theatrical way to eliminate noise-Power By 【 China power house network 】

A sound system of noise, the situation is different, it can come from multiple sources, audio engineer dealing with more complex situation analysis, judgement, are processed separately. General noise can come from three aspects: one is the device inherent noise; second external clutter noise; the third is the power of noise.

The following are about specific treatments.

Device inherent noise removal

Audio system is composed of multiple devices, such as a microphone, DVD deck, mixer, effect, equalizer, compressor, actuators, electronic, divider, amplifier, speakers, etc., each device may be the source of the noise. If you want to discover, determine noise is generated from which unit shall for each unit of inherent noise detection, specific inspection procedures are described below.

1, open sound system

Boot order is the order of the signal process step by turns. Power on the system, the noise from the speakers. First, you can turn off the wireless microphone receiver power supply, and to see if you have noise. If the noise disappears, you prove that the noise is not a wireless microphone receiver, you can then detect other cells.

You can turn off 2, other microphone audio gain GAIN knob

If you turn off the microphone channel a channel GAIN knob, the noise disappears, you can determine the noise is generated in this way. If the noise continues, to detect other cells.

3. turn off the DVD player power, observe whether noise disappear

If the noise disappears, the noise source is the resulting; if there is noise, noise is not a result, you can continue to test other cells.

4. close the mixer's power switch, and listen to the noise is gone

If the noise disappears, then prove that noise is generated by a mixer; if it still exists, that noise is generated by another unit.

5, you can turn on to shut down debate around the equipment to listen to

Continue on effects processor, Exciter, compressor, equalizer, electronic dividers, power amplifier, acoustic feedback suppressor, and other peripheral equipment for shutdown and listen, observe the noise is gone. If you close a session when the noise disappears, then prove that noise is generated by this unit.

6. specific checks

In the cell found noise, you can open the enclosure in the future, the structure of the organism to specific inspection, detection circuit board cross-wiring, outlets, and interface, connector contact good. The components are not live testing, repair ability can detect faulty or damaged parts. If you do not have the capacity, it is necessary to replace the maintenance of new cells.