Check the many links in this site for great information about acting.
You might be interested in exploring paralanguage — voice variations in speaking that make phone calls and recording so much richer in nonverbal communication than the written word. Actors often practice paralanguage by speaking the alphabet in ways that indicate different meanings or emotions.
Here are some sites:
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In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps a little more. Thanks for asking.