" A high-pitched voice may sound less authoritative, more youthful, and less experienced, whereas, a lower pitched voice may be perceived as being more authoritative, confident, and credible. It is unfortunate that listeners will make assumptions based on these differences before even knowing the depth and value of your message. Play with your ranges and find a comfortably low pitch. Practice it to see if it makes a difference in conveying more authority and brilliance. "

― Susan C. Young , The Art of Communication: 8 Ways to Confirm Clarity & Understanding for Positive Impact(The Art of First Impressions for Positive Impact, #5)