I used to be very soft spoken as a child but over the years I've taught myself to speak at a medium volume by default, as speaking quietly often fed the erroneous assumptions about my being "shy"(Much to my irritation. Shy is not the word I'd use to describe what I am, and if you sincerely think of me as being shy, we really need to get you a dictionary). I just really loathed the idea of being treated like some timid little mouse, almost as if I weren't competent in the ways of the world of my own. It was horribly embarrassing to me for whatever reason, and it still is on the instances when my quiet voice seeps out. I'll never be a human megaphone(I still get told to speak up during say, presentations, which is annoying), but then again, I have not the slightest desire to be one(talk-yelling is cringeworthy), so I suppose it's fine.
Honestly, I wouldn't really care if everyone thought I was shy so long as they didn't subsequently begin to treat me as if were labeled "fragile" as if those two factors were actually synonymous or even connected in true form.
Perhaps it's all in my head, who knows and more importantly, who cares, I mean that wouldn't exactly be novel. Either way not a talker=/=shy, I'd like to get that on a billboard.