Using Your Voice
Radio DJ's are usually a good example of this.
1. Develop your voice. A high or whiny voice is not perceived to be one of authority.
2. Animate your voice. Avoid a monotone and use dynamics. Your pitch should raise and lower periodically. Radio DJ's are usually a good example of this.
3. Use appropriate volume. Use a volume that is appropriate for the setting. Speak more softly when you are alone and close. Speak louder when you are speaking to larger groups or across larger spaces.