When many conference system engineers are installing and debugging project
projects, someone often reflects the problem that there is current sound in the
conference room speakers. Generally, the conference system power supply and LED
lighting power supply are in the same circuit, and no abnormality occurs after
the installation and commissioning of the public address system equipment is
completed. After turning on the LED lighting, it is found that the current sound
of the speaker is too loud, and the sound sources (wireless microphone, audio
processor, control panel, video conference terminal, laptop) are checked one by
one without success.
There are several reasons for this:
1. The power supply of your audio equipment is not clean. It shares a group
of power supplies with high-power equipment such as lamps and air conditioners.
The lamps are all equipped with ballasts, which cause current interference after
they are turned on. This is electrical noise.
2. I don't know if you have a wall plug to wait for audio signals to arrive
at the mixer. If so, it may be that the audio signal cable is not threaded and
has gone with the strong current, causing interference.
Troubleshooting method
1. According to your description, it should not be the local noise of the
audio device itself, which can be ruled out.
2. Because this problem occurs after you turn on the light, it is probably
a power supply problem. You can replace the power supply, for example, directly
replace a group of power supplies. Now the conference room will be divided into
several power supplies. You can try to find the power supply with no or very low
noise.
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