Neighbor's house emitting a beeping noise?

[Flyover]

There's this one house in my neighborhood, when I walk past it, I hear these incredibly high-pitched beeps. Almost sounds like it's coming from inside my own head, except I only ever hear it walking past this one house. Four beeps, then a pause, then four more, then again a few more times, each time quieter than before, like an echo. I don't know if it gets quieter because I'm walking constantly away from the source or if it's because that's how it's programmed to sound.

Today I looked and saw a device like a small black plastic box on a stick, embedded in a mulch bed at the front of their house. Didn't look like a spotlight or anything. I don't know if this is connected to the beeping, but if there was a device that sent out an almost supersonic beep I'd expect it to look like that.

Anyone know what this might be?

 

[havasu]

Many install those cat piss prevention devices, which also work on dogs. Maybe that is what it is?

 

[bud16415]

Did it look like this.

https://www.amazon.com/Ultrasonic-R...3835054&sprefix=pest+control+n,aps,221&sr=8-9

 

[Flyover]

I'm not sure what it is. A device to keep some kind of animal away makes the most sense. I'll have to pay closer attention and see if there's a weird lack of animals in that yard.

It doesn't look like that thing @bud16415, but it's probably a similar size.