Men and women with deeper voices are more likely to land in leadership positions and are generally perceived as a greater authority. (businessinsider.com)
After that, the new, deeper voice becomes much more stable and easier to control. (kidshealth.org)
Plus, I believe deeper voices, both male and female, lend an air of authority to the speaker's words that just can't be matched by higher voiced types. (datinggoddess.com)