Does anyone get static like noise on all there cam v4

I have 3 cam 4s hooked up in different places and they always have a static like noise on the audio I cant figure out why any help would be much appreciated.

I wonder if posting a video (including the audio) would be helpful in troubleshooting this—getting some ears on the situation, so to speak.

I have two V4 cams in operation and they do not have static. Some of my V3 cams do.

On my single v4 all I hear is crickets, no static at all. The v3s on the other hand are a total disaster. Known and irreparable issue.

Here is a link to some audio fr0m one of the cams

Here is one from a different cam