Loud Radios? The neighbors may have tried this ploy - on me!
They must notice, however, that I wear hearing aids . . . except at those times when they have loud music playing . . .
A stuffed cat works well at repelling birds. You just have to move it often - like a couple of times a day. I also enjoyed finding out-of-the-way places for the toy cat, slightly hidden under plants or looking out of an overturned bucket, that sort of thing. I wonder if this would work for mammals [url=https://www.plushtoysafari.com/files/1744598/uploaded/Jumbo%20Minky%20Jumbo%20Brown%20Bear.jpg]. . . (click)[/url]
If not, it might make a good sleeping companion for an old dog. He'd have to go looking for it every night, if you moved it around a lot.