Saw a thing once, maybe Mythbusters, that showed how beavers are attracted to the sound of running water and want to stop it. In the show, they got the beaver to dam a speaker by playing river/stream noises through it.

I like to do it in song:

https://www.youtube.com/watch?v=wmKHHdqwVes

That’s a stethoscope for proctologists and OBGYN.

WRONG! After minorities, it’s poor people. Then doing their job. :P