In my experience, a high-pitched voice does not necessarily garner the squeaker title, either . . . So long as vox communications are short, relevant and to the point.
For example: "Target, check six!" Not squeaker.
For example: "And, um, then there was, um, there was, um, there was this one time that, um" *beep* "There was this one time that, um, this one plane, um, I think it was a 190, um" *beep* "um, so anyway this plane, it, like, dove down, and, um, I tried to get out of the way, and like" *beep* "Like there was this, um, tree and I hit it and I, like, died." Definitely squeaker.
YMMV.