Loud obnoxious constant beep during playback

I usually record with my microphone with audacity and haven’t had this problem until today.

This is what it looks like in Audacity:

This is the sound I get (WARNING: Please turn down your audio):

What could be causing this issue?
I’ve tried on another PC and same result.
As far as I know, I haven’t touched any audacity setting.
I recently have taken my microphone outdoors for some podcasting, so could the exposure to outdoors have affected the equipment?

It sounds like these could be sisters.


Is it a USB microphone?

Can you try a fresh USB cable? If that’s it, that’s the digital signals in the USB cable leaking into the battery system which runs the super sensitive sound element inside the microphone. They are supposed to ignore each other, but there are computer and microphone combinations that drive each other crazy.

Which microphone?

I tried a filter we designed to get rid of that USB interference. Mosquito Killer. I set it to 8 mosquitoes.

Mosquito-Killer4.ny (360 Bytes)
That’s the Nyquist plugin. Even though it seems to work OK, it really is slicing out some musical tones from the show and you really should find out what’s causing it.

Can you try another computer? It’s pretty rare to have two of them in a row scream like that.