Buzzing in the capacitive microphone

Thread Starter


Joined Apr 29, 2020
Hello. I´m using capacitive microphones in a classroom. The question is I have a constant noise, like wind or buzzing. I think it could be because the wires of the microphones are next to the wires of the AC power of the lights. How far they shold be? I think as far a possible, but for example 1 feet it could be enough?

Thank you

Best regards

Audioguru again

Joined Oct 21, 2019
The cable between the mic and its preamp should be a shielded audio cable. The shield blocks interference.
The mic, its cable and its preamp should not be near AC power.


Joined Jan 23, 2018
Is the noise like rushing wind? or like a loud low pitched HUM?? two different things with different causes, except both would be cable problems. A photo of a connector, unplugged from the microphone, will tell some of us a lot. OR is it a wireless microphone?
ALSO, there is a lot more to the system than just the microphone.
Is the rest of the system built in to the class room? Or is it a portable system?? Is this an auditorium classroom, seating a few hundred? Or smaller? Is this a college or a high school?? Amazingly, that often matters.
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Thread Starter


Joined Apr 29, 2020
Big mistery, the noise has disapeared!

So you know, if it works, DON´T TOUCH IT!!!

Tanks for your help and advice