You can improve your professional speaking by perfecting your vocal energy.

Energy is the vitality and enthusiasm you bring to your voice and is not to be confused with volume.

Volume is the decibel level at which you speak.

Energy is the intensity in the voice.

It is the difference between speaking at people (volume) and to people (energy).

Whether you're speaking with your full voice or softly, energy is a vital element. Supporting the voice from the diaphragm enables you to use a stronger, more energetic voice without pushing or forcing.

In her book Building the Power of Your Voice: How to Improve Your Voice to Command Attention & Move People to Action Dr. June Johnson suggests exercises to improve your energy level, and many more exercises and tips that will assist you in improving your professional voice.
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