Works on 2nd ten iPod touch

I could hear the full range of sounds on this app, of course when I went in to get my hearing checked and went into the soundproof room I could hear them talking. Guess I was off the charts in all his 30 years of practise. As a kid I used to have to cover my ears when entering the mall cause the security system emitted a very high squeeling pitch, much higher then this. Im sure others will hear it all too.

Got this app when it was free but it didnt show in my list till today. Pretty cool app and I bet might be good for training a animal.

Quixopix about Dog Whistle