Phonetic
Phonetic (from the Greek word φωνή (phonê) "sound" or "voice") is a study of the physical sound of a human conversation. It relates to the physical nature of the sound (font), as well as physiological production processes, auditory receipts, and neurophysical perceptions. Phylogenetic science began to be studied as early as 2,500 years ago in ancient India, following Pāṇini's note on the place and sound-producing behavior of consonant sounds in the 5th-century BC book in Sanskrit. The main Indic character system today comprises consonants according to the Pāṇini classification.