Does this sound remarkably like your interference?
https://www.kozco.com/tech/audacity/clips/USBMicrophoneWhineClip.mp3
That’s what happens when USB digital housekeeping and the voice sound cross.
It’s a condenser microphone, right? The computer is making a ratty, sloppy USB connection based on the argument that the microphone will take care of it.
The microphone or microphone system cut corners based on the idea that we’ll let the computer take care of it. What you have is what happens when nobody takes care of it. We publish a filter that “knows” what a common USB noise sounds like and gets rid of it.
https://forum.audacityteam.org/t/usb-whine-filtering-yeti-curse/45601/35
However. It does it by eliminating some musical tones from the performance. If your voice happens to hit one of those tones, it will briefly sound distorted.
The only way we ever found to fix it forever is change the computer.
I’m not joshing. We tried all sorts of USB patches, and configuration changes, and USB devices. No luck.
That’s not going to fix all of your problems because you also have low volume and killer hiss noises.
To go any further, well need details on the microphone, interface, etc, etc.
Koz