Table 4. Mean durations and (Standard Deviations) of tense and lax contrasts (Duration in ms)
English tense and lax contrasts
High-front vowels
High-back vowels
/i/
/ɪ/
/u/
/ʊ/
Level 1–2
122 (40)
106 (49)
174 (50)
123 (30)
Level 3
107 (17)
78 (14)
161 (19)
81 (13)
Level 4–5
90 (15)
47 (8)
170 (14)
69 (19)