Complaints cat deterrent ultrasonic deterrent

[mosquito]

http://www.netmums.com/coffeehouse/hous ... f-all.html

I don't rate those ultrasonic cat repellers either. When I lived in my flat our downstairs neighbours had one in the communal garden and whenever he turned it on, I could hear it in my kitchen if the windows were open!

It was like a very high pitched, almost silent, constant noise. It gave me terrible earache and headaches and made me feel sick.

My bf couldn't hear anything so maybe I have super human hearing