Voice Power
For those who are constantly interrupted or asked to repeat themselves, the problem may not be what they're saying, but how they're saying it. Voice coach Renee Grant-Williams, who works with singers and politicians like Linda Ronstadt and John Ashcroft, shows how to make one's speech resonate impressively in Voice Power: Using Your Voice to Captivate, Persuade, and Command Attention. She reveals how to enunciate consonants for dramatic effect, use breathing techniques to make the voice richer, deploy strategic silence, cope with stage fright and leave authoritative voice-mail messages. There are copious useful exercises. There's also a chapter on maintaining a healthy voice.
“I was impressed that the author sought to train and not to impress.”
You will learn what you do wrong and then you learn how to correct it. Without recognizing your speaking problems (ALL of them, not just one such as a fear of speaking in public), you won't be a better speaker.