Greetings

I've been wondering something and figured this is the right place to ask because you guys love science and because google is not being useful for this matter.

So the matter in question is related to my voice. I have drastic changes of entonation/pitch when talking. It may be sound deep while I phrase some words and then it goes all prepubecent like. You dont know how anoying is. It discourages me from even talking for the most basic stuff.

My theory is it has to do with athmospheric pressure but cant prove it. Do you know why does this happens? Im hairy as fuck too so I doubt it has to do with testoterone lol

Pic unrelated, just the first SFW pic I found on my phone