It has been shown that we are more likely to be affected by voice of a speaker than by the words spoken. It is how the speech is delivered, rather than what is said, this is most important.
There are five basic ways you can vary your voice when you speak. The variables are volume, pitch, rate, quality and character. Let’s cover these individually.
How loudly or softly you say your words makes a difference in the emotion or impact of those words. For example, if I was to say, “I am very angry” with a soft voice, I’m not as likely to give you the impression that I’m angry, as I would if I said the same thing loudly.