This morning I was editing a podcast episode, and every once in a while I would hear a repeated alarm sound. It wasn't loud, but it was just at the right decibel level bug the listener. It was so tiny on the frequency display, so I had to go over the patch of audio it was in until I found it:
The white outline shows where the noise is, which looks like a very thin line.
It was hard to get out, but I got it! After, you couldn't tell there was a high pitch noise at all!
Here's the recording with the high pitch noise:
Here's the recording without the high pitch noise: