phonetics
noun
pho·net·ics fə-ˈne-tiks 
plural in form but singular in construction
1
: the system of speech sounds of a language or group of languages
2
a
: the study and systematic classification of the sounds made in spoken utterance
b
: the practical application of this science to language study
Example Sentences
Recent Examples on the Web While at Oxford, Hayes plans to study for graduate degrees in mathematical science as well as linguistics, philology and phonetics, according to the university. 
Ruth Serven Smith | Rserven@al.com, al, 23 Nov. 2021 The class is held on Wednesdays via Zoom and will be covering Moses-Columbian language history, phonetics/orthography, vocabulary, and grammar. oregonlive, 8 Oct. 2021 Francis Andrade, who lives in Woodbridge, Va., had planned to use the Barbie Pond display as a visual aide for her students, who are deaf children learning to communicate with their Hispanic parents through phonetics. Washington Post, 27 June 2021
Ruth Serven Smith | Rserven@al.com, al, 23 Nov. 2021 The class is held on Wednesdays via Zoom and will be covering Moses-Columbian language history, phonetics/orthography, vocabulary, and grammar. oregonlive, 8 Oct. 2021 Francis Andrade, who lives in Woodbridge, Va., had planned to use the Barbie Pond display as a visual aide for her students, who are deaf children learning to communicate with their Hispanic parents through phonetics. Washington Post, 27 June 2021 Word History
Etymology
phonet(ic) + -ics
First Known Use
1836, in the meaning defined at sense 1
Medical Definition
phonetics
noun, plural in form but singular in construction
pho·net·ics fə-ˈnet-iks
1
a
: the study and systematic classification of the sounds made in spoken utterance
b
: the practical application of this science to language study
2
: the system of speech sounds of a language or group of languages