IPA: /fəˈnɛtɪʃən/
KK: /fəˈnɛtɪʃən/
A person who studies the sounds of human speech and how they are produced and perceived.
The phonetician analyzed the different accents in the language.
Phonetician is formed from "phone" (from Greek "phōnē", meaning voice or sound) and "-ician" (meaning a specialist or expert). The word refers to a specialist in the study of sounds and speech.
Think of 'voice' or 'sound' ('phone') and remember that a 'phonetician' is someone who specializes in studying those sounds.