If you were to log in, you'd be able to get more information on your fellow community member.
Frequency response of hearing varies widely among individuals. Until I was 30 I could hear beyond 30 kHz. There was a department store in Meriden, Connecticut that I couldn't enter because of the pain caused by their so-called ultrasonic burglar alarm which was run all day long. By the time I was 40 I couldn't hear the 15.7 kHz whine some televisions make.