I've never heard shrill used to describe a voice, I for one mostly associate it with mechanical noise ("The machine errupted to life with a shrill screch"). In

I've never heard shrill used to describe a voice, I for one mostly associate it with mechanical noise ("The machine errupted to life with a shrill screch"). In any case, in the above comment it is used to refer to the way the pitch of male and female voices rises when frightened or exited and is far from being a gender-specific slur.