Paralanguage

Paralanguage is vocal effects that accompany or change an utterance's phonemes and may communicate meaning [Merriam-Webster Online Dictionary].
Paralanguage is a non-verbal means of communication, such as speaking tempo, vocal pitch (intonation), laughter, intonational contours, and sometimes gestures and facial expressions that accompany speech provide meaning [YourDictionary].
The meaning of what you express is in the words you say, but how you say it also carries powerful meanings. For example, the word ‘Yes’ may have various meanings. It depends on how it is said — sincerely or sarcastically [Ifioque].
Here are several examples of paralanguage [Study.com]:
 A loud sigh shows frustration or listlessness.
 The token ‘mm-hm’ shows agreement.
 The token ‘mm-mm’ shows disagreement.
 A faster pace shows excitement or nervousness, and a slower pace shows boredom or uncertainty.
 Pauses and hesitations indicate uncertainty.

Sources:

⠀ Paralanguage. Ifioque. Retrieved from: [https://www.ifioque.com/nonverbal-communication/paralanguage].

⠀ Paralanguage. Merriam-Webster Online Dictionary. Retrieved from: [https://www.merriam-webster.com/dictionary/paralanguage].

⠀ What is paralanguage? Study.com. Retrieved from: [https://study.com/learn/lesson/what-is-paralanguage-examples-communication.html].