Radio Interference sound

I know I’m going to sound absolutely insane but I’m used to it by now. Did anyone else around 12-2 CST hear what sounded like radio interference or some grinding noise? I was in the middle of this salon and I heard what sounded like a woman speaking over a CB/static radio/old tv loudly like on a speaker and I looked around and no one was even flinching. I heard it twice. Then I heard a grinding noise twice at the same volume. Looked around, and again no one reacted.