This is quite old. In fact it has already become a Law and Order subject, because as the sound is only distinguishable by young kids, it has been adapted by some as cell phone ringtones so they can hear during school and not get caught while receiving calls.
The only creatures I feel sorry for are the poor dogs that are going to have to put up with this noise everywhere now....Canine Revolt!
Well that pretty much eliminates all of the teenagers with i pods .What else is it good for ? I guess it could be used to prevent toddlers and young kids ....and dogs....from going to certain areas .
