Peter Blanck, in his research, found that judges communicated their bias and attitudes by the tone of their voice. The juries in California were twice as likely to convict trial defendants when the judges already knew the defendants had a record and prior convictions. The law simply states that the judge cannot share this private information with the jurors. Researchers found that when (judges) the judge gave the instructions to the jury, his words and tone of voice lacked warmth, patience, and tolerance.

You can change your rate of speech, your vocal fillers (um, uh, ah), the volume, pitch, inflection, emphasis, and even the pauses that you use. You can keep an audience listening with both ears and with full energy, rendering them absolutely spellbound because of the power of your voice.

Your voice is who you are. It is your trademark and your calling card. Your voice must exude energy, confidence, and conviction. We tend to judge others by their voice: Is it confident, nervous, relaxed, energized, tired, weak, or strong? If you sound unsure and timid, your ability to persuade will falter. Persuasive voices have great volume, varied emphases, good articulation, and a pleasing pitch. Master Persuaders use vocal variety and frequently vary their pace.

The good news is you can change many characteristics of your voice. Tape your voice. What does it project? Your voice must be interesting and easy to listen to in order to help, rather than hinder, your ability to persuade. Does your voice work for you or against you?

Pace refers to how quickly you speak. Mehrabian and Williams found that people who spoke faster, louder, and more fluently as well as those who varied their vocal frequency and intensity were perceived as more persuasive than those who did not.

Speeches delivered at fast speeds are more persuasive than those of slow or moderate speeds, because persuaders who speak faster appear more competent and knowledgeable. At these faster rates, receivers are not able to mentally engage in counter-arguing.

Pace and speed are also important to keep and capture attention. We can think three times faster than we can speak. We have all had conversations and were able to listen while thinking of other things. When we speak faster, we can keep attention longer. There is less time for our audience