Trading relations between tongue-body raising and lip rounding in production of the vowel /u/: a pilot "motor equivalence" study - Perkell, J S; Matthies, M L; Svirsky, M A; Jordan, M I (The Journal of the Acoustical Society of America, 1993)
Keywords: Female; Humans; Lip; Male; Phonetics; Pilot Projects; Speech - physiology; Speech Acoustics; Speech Production Measurement; Tongue