My only concern is my husband seems to be able to hear those "mosquito" devices- the things that emit a high pitch whine that is supposed to "deter youths and younger teens from hanging around outside stores". Drives him nuts and he says it makes his teeth hurt. I think Ive heard those once or twice though, sounds like a more intense version of when your ears ring.
I don't think those use ultrasound waves though since they are supposed to be heard by humans..just younger humans lol.
Re: for the bug-aphobes
Might have to look into it!
My only concern is my husband seems to be able to hear those "mosquito" devices- the things that emit a high pitch whine that is supposed to "deter youths and younger teens from hanging around outside stores". Drives him nuts and he says it makes his teeth hurt. I think Ive heard those once or twice though, sounds like a more intense version of when your ears ring.
I don't think those use ultrasound waves though since they are supposed to be heard by humans..just younger humans lol.