Literally, I just had the strangest experience occur to me. I was sitting on my bed with my head against the pillow and I starting hearing these radar sounds, like the ones from those military movies? They came in evenly spaced intervals, each ping started off loud and then reversed/faded like in the movies, and what's weird is I couldn't locate a single source. There were no electronics that could've caused that sound (to my knowledge), it sounded more than faint but less than clear, and had no direction to it. It's literally as if it was eminating from above my head but more lower. It persisted too when I got up and searched the house. Never faded, never faltered. It only started to falter when after a minute and basically it pinged, slipped a ping, pinged again, then nothing. I was reading up on it with tinnitus, people having RF Hearing, and found a page of people who claim to hear radio stations but I just wanna know wth is going on lol.