The Analyzer has a few more, less critical things to say, but these are the important ones:
OBS (Open Broadcaster Software) is free and open source software for video recording and live streaming. Stream to Twitch, YouTube and many other providers or record your own videos with high quality H264 / AAC encoding.
obsproject.com
Your reported problem might be a different result of mismatched sample rates than what I usually see, but it could still be involved.
Most of the time, a mismatched sample rate has a constant level but it's garbled or crackly all the time. A mathematically-correct resampler is completely transparent - you'd never even know it was there - but OBS does not resample at all, which leads to frequent small "holes" or "skips", each of which is a "pop" by itself, but they happen frequently enough that they combine to form their own sound.
Yours does fade in and out, and it's clear when it's in, but I still wouldn't completely rule out poor handling of a mismatched stream.
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At any rate, fix all 3 of the problems that I screenshotted, and see if your original problem goes away too.
It's also possible that Windows itself is messing with the mic before it even gets to OBS. If the above doesn't fix it, that's the next witch hunt. Go through ALL of Windows' settings, even the ones that are hard to get to because they're that far in on purpose, figure out what Microsoft's labels actually mean, and turn off everything that is not a "dumb wire" between the mic and OBS.
The reason that stuff is on by default and hard to find, is because Windows' primary use for a mic is a business conference or family video call in a terrible acoustic environment. Almost nobody thinks to turn off the fridge, air conditioner, fans, etc, and so Windows has a Noise Suppressor that tries to figure out what's noise and remove it, along with some other processing. (OBS has a Noise Suppressor too, as a filter that you can add) Then to avoid a clueless business manager or meddling kid from messing it up and then blaming Microsoft, it's hidden to where you're probably not going to stumble onto it. You need to find that, wherever they've put it and whatever they've called it, and get rid of it.
But see if the screenshotted fixes work first.