Comb filtering (https://youtu.be/Amj4UevyRfU?si=5pwjHKwAw6bdmG2x) plays a role in this.
I was listening to a podcast and realized I could hear the speaker turning pages under the microphone by the way it affected their voice in the microphone rather than the rustle of the page. It was pretty wild. I could ‘see’ it before i recognized what was going on.