it about a study of the production of Thai vowels, consonants, and tones. and An interesting feature of the Thai consonant system is the existence of three level of stop consonants voiced, voiceless unaspirated, and voiceless aspirated. All consonants can occur initially, but only voiceless unaspirated stops, nasals, and glides can occur finally. this topic helps to learn about Thai vowels and consonants which can help to study research in phonetic of Thai