Cicadas. 24/7. Every one of them that sang in the maple trees last summer now sing inside my head, and have done so for fifteen years. The VA says it was my time on the flight line with those little screechers. Ten years ago, they gave me the best hearing aids they could muster which made it possible to maintain a high quality of life and when they were out, I had a hard time hearing conversation, but with them in, things worked well and the tinnitis was squelched nearly out.
This year, they fit me with the newest technology again, and I have no problem (though I still hear it) with tinnitis, but the volume of these new ones is an either/or proposition. Turn the volume up enough to hold a normal conversation at the dinner table, and each scrape of fork or spoon on plate is translated to an insane clang. TANSTAAFL.