paralinguistics
/ˌparəlɪŋˈɡwɪstɪks/Linguistics
noun
The branch of linguistics which studies non-phonemic aspects of speech, such as tone of voice, tempo, etc.; non-phonemic characteristics of communication; paralanguage.
Origin
1950s; earliest use found in Archibald Anderson Hill (b. 1902). From para- + linguistic: see quot. 1958.