In our region, some people have devices to repel moles or marten using "Sounds that are inaudible for humans". I have yet to come near to one of these devices that I can't hear. And it's not only me, my wife can also hear them, as well as my daughter. I also know some people who can't hear anything from these devices, but it feels like the statistics about what people can hear and what not are not that up to date.

I used to hear the remote from TVs especially old Philips ones and LG's with the single chip on them. That was until I hit 44... after that is hit or miss or just imagining.