From my perspective, a lot of it is how I project my voice when I talk. Before, a lot of times I would hesitate when talking, which sounded like I was mumbling. At my job they actually noticed it and told me I had to speak up because they couldn't hear me. Now I have a confidence behind my voice and I say what needs to be said. As to the tone itself, there have been a few instances where it sounded deeper to me. It may be placebo since I feel so much better about myself, but I definitely don't find myself being afraid to speak clearly and loud enough to get my message across anymore.