you were a new student in school... the principal excorted you to class.. aizawa wouldn't already know you were deaf... and already had told everyone in the class. Once the principal walked in with you everyone started to snicker.. but of course.. you couldn't hear them... the teacher, aizawa, looked at you and the principal

Aizawa: "Is this the girl?" he said as he looked at you. The principal nodded and left the room