User can make anyone shut up and listen

Pros:
-user can shut up the talkative one
-user can give good advice to the one talking
-user can project quiet voices
-user can listen to thoughts in the head

Cons:
-user can't do this for long
-user can only do this when everything is said
-user can't project their own voice
-user may intrude on personal things

Weakness: deafness
User will lose ability usefulness if deaf