Hey guys, I was browsing through the other day and a voice deepening thread caught my eye.... anyways I wanted pass on what I know. This may or may not work for you and it might be kind of unrealistic if you dont have somewhere to be really loud. Anyways so I was in the marines and you have to go through boot camp where you literally have to scream as loud as you possibly can everytime you speak, if you dont then you get hazed. I was in bootcamp for 3 months just to get an idea and I probably lost my voice like 3 times through the whole ordeal. So basically what happends is you totally destroy your vocal cords to the point where when you try to speak nothing comes out. It's harsh and you'll get a bad soar throat from it but when your voice restores itself and it will you will have a noticeably deeper more booming voice, you will be louder. So thats my experience anyway and I hope it helps, my problem is that now I have to reverse the effects!