So my voice is very deep and when I'm alone I can speak very normally and clearly but the moment I speak to someone else my voice gets super deep and many people can't understand me, I also talk quietly in these times because if I talk louder the room kind of goes silent.  
It's more of a subconscious thing, I don't think of it but my body just does it automatically and it's very annoying especially considering that I can't find anything to help it, therefore I wrote this post.