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Those things are supposed to be inaudible to human ears. Do they make something like that for crying babies?

There used to be a motorcycle that parked on the sidewalk in front of the parking lot. It had some sort of proximity alarm on it that chirped if you passed too closely. It took me a long time to figure out what it was.
I haven't noticed it for awhile (like a few years), and in fact, the motorcycle may no longer be there, but maybe someone else has a similar alarm.

It could be one of those new devices they sell that let off a high pitch sound to keep dogs from barking. I've seen the commercials for them but wans't sure if they would really work. Maybe they do?

Well if your dogs won't go out into the yard perhaps you should. Maybe you can track down the sound by following it to it's source.

I live on Mercer, between Barrow and Grove, and there is a beeping sound which keeps happening randomly. It sort of sounds like a smoke alarm low battery alert.

The sound is driving our dogs nuts, they are too scared to go into our yard at all.

Does anyone know where this sound is coming from?

tks