Phonetics

n. study of the representation and production of speech sounds, study of phonetic systems (Linguistics)

Phonetics (from the Greek word φωνή, phone meaning 'sound, voice') is the study of the sounds of human speech. It is concerned with the actual properties of speech sounds (phones), and their production, audition and perception, while phonology, which emerged from it, studies sound systems and abstract sound units (such as phonemes and distinctive features). Phonetics deals with the sounds themselves rather than the contexts in which they are used in languages. Discussions of meaning (semantics) do not enter at this level of linguistic analysis.
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Pho·net·ics n. The branch of linguistics that deals with the sounds of speech and their production, combination, description, and representation by [more]Phonetics - Community and Resources

Noun
1. the branch of acoustics concerned with speech processes including its production and perception and acoustic analysis
(hypernym) acoustics
(class) long

(n.)
The doctrine or science of sounds; especially those of the human voice; phonology.
  

(n.)
The art of representing vocal sounds by signs and written characters.