Table 3 Backness and height values of nucleus vowels.

From: Listening to the verses: unveiling phonetic contrasts in Li Bai and Du Fu’s poetry

Vowel

Backness

Height

i

1

7

e

1

5

ɛ

1

3

æ

1

2

a

1

1

ə

2

4

ɐ

2

2

u

3

7

o

3

5

ɔ

3

3

ɑ/ɒ

3

1