Don't know, I thought it was grounding, but the area I touch on the unit is covered in plastic. That's why I thought it was body capacitance. I don't get it
I recently bought some uhf wireless mics to use for horns and vocals. The ones for the horns work fine, but the headset mic has a high pitched whine. When I touch it the whine disappears, which I guess means it has something to do with body capacitance or grounding. I've attached an audio file...