The voice is the barometer of your emotions. If your presentation is filled with rising inflections, you'll sound tentative and unsure of yourself. Are you asking permission or are you speaking with conviction? To sound more confident in your ideas simply bring your intonation down at the end of a sentence. People hear your statement as a declaration and not a question.
To hear what uptalk sounds like, click the play button:
To see if you have Uptalk, call (212) 481-8484 x.312 for a free 10 minute consultation. Ask for Diane DiResta.