Ok i get it. Its just a term used to insult someone. But it isnt bias if they are young or not. And it differs between people with annoying voices to people who complain about several things.
A squeaker only has one meaning, has nothing to
do with age or maturity. I dont even think it is to insult anyone iit is only
determined by what degree a high pitched voice hurts your
ears on vox. (normally this is a very young player)