Humming at School

I enjoy proposing ideas for scientific study in society while interacting with the populace that exists within my school. For example: How do people react to humming? I have found that when a person hums in tune it is not displeasing to the people who hear the hummer. However when the hummer jumps all over and does not hum in tune, then it can sometimes be painful for the people who have better pitch. So I strive to have perfect pitch when I hum in the hallways quietly. For the extra-loud hummers, I sometimes wonder what will happen if their teeth start vibrating when they reach the resonant frequency of their incisors. 

 Oh well, I guess I'll never know. 
>crunch<