"Phonetics (pronounced /f\u0259\u02C8n\u025Bt\u026Aks/, from the Greek: \u03C6\u03C9\u03BD\u03AE, ph\u014Dn\u0113, 'sound, voice') is a branch of linguistics that comprises the study of the sounds of human speech, or\u2014in the case of sign languages\u2014the equivalent aspects of sign. It is concerned with the physical properties of speech sounds or signs (phones): their physiological production, acoustic properties, auditory perception, and neurophysiological status."@en .