deeper voice= more powerful

People with deeper voice are shown to be perceived as more powerful. When you are asking for a negotiation, giving a presentation of a proposal, or in position where you need to be perceived as confident and trustworth, try deepening your voice some. I haven't been able to find definite published data on women since that seems debatable, but I agree that someone with a lower voice would sound more confident compared to someone with a high-pitched voice.

Here's someone gorgeous who happens to have a deep voice:

from imdb.org