What is the term for the vocal expression that can alter the meaning of spoken words?

The term that refers to the vocal expression that can alter the meaning of spoken words is paralanguage. Paralanguage encompasses the non-verbal elements of communication used to modify meaning and convey emotion. This includes aspects such as tone of voice, pitch, volume, and speech rate. These vocal qualities can significantly influence how a message is interpreted, adding nuance and context that are not present in the words alone.

For instance, the same sentence can have different implications depending on whether it is said with a warm tone, a sarcastic inflection, or a loud, aggressive voice. This is crucial in interpersonal communication as it helps speakers convey feelings and intentions more effectively, enhancing understanding and connection between individuals.