The branch of acoustics concerned with speech processes including its production and perception and acoustic analysis WordNet 3.0 & Open English WordNet

Phonetics is a branch of linguistics that studies how humans produce and perceive sounds, or in the case of sign languages, the equivalent aspects of sign. Wikipedia

The study of the sounds of human speech Wikipedia Disambiguation

Branch of linguistics that comprises the study of the sounds of human speech. Wikipedia Disambiguation

Branch of linguistics that comprises the study of the sounds of human speech Wikidata

A branch of linguistics that comprises the study of the sounds of human speech. OmegaWiki

The study of the physical sounds of human speech, concerned with the physical properties of speech sounds (phones), and the processes of their physiological production, auditory reception, and neurophysiological perception, and their representation by written symbols. Wiktionary

Study of speech sounds and their representation by written symbols. Wiktionary (translation)