The noise sensitivity isnt accurate at all. If you set it on silent mode (which is 100 percent noise sensitivity) you can sit 2 feet away from your phone and have a normal volume level conversation and it wont go off. I basically had to yell to get it to go off and the phone was in arms reach. So if you are in a classroom full of kids they can all talk in a low to normal volume and it wont set it off. Once the kids figure this out it will probably encourage them to talk because they see it isnt going off.
--Dashes-- about Too Noisy Pro