VOWEL POSITIONS AS SHOWN BY X-RAY

[1] CHIBA T, 1931, RES CHARACTERISTICS

[2] MARICHELLE, 1897, PAROLE APRES TRACE P, P31

[3] PANCONCELLICALZ.G, 1919, VOX, P170

[4] PARMENTER T, 1931, Z EXPT PHONETIK, V1, P63

[5] The mechanism of speech [J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1929, 1 (01) : 83 - 109

[6] VIETOR, 1914, MISC PHONET, P2

[7] 1928, VOWEL

[8] 1931, SPEECH VOICE

[1] CHIBA T, 1931, RES CHARACTERISTICS

[2] MARICHELLE, 1897, PAROLE APRES TRACE P, P31

[3] PANCONCELLICALZ.G, 1919, VOX, P170

[4] PARMENTER T, 1931, Z EXPT PHONETIK, V1, P63

[5] The mechanism of speech [J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1929, 1 (01) : 83 - 109

[6] VIETOR, 1914, MISC PHONET, P2

[7] 1928, VOWEL

[8] 1931, SPEECH VOICE