Table 1 Previously proposed sonority (aperture) scales.

From: English phonology and an acoustic language universal

Sonority (aperture) scale

Proposed category

Corresponding English phonemes

de Saussure (1916/1959)14

6

a

/æ, αː,Λ

5

e, o, ö

/e, ɔ, ɔː/

4

i, u, ü

/I, iː, , uː, j, w/

3

Liquids

/l, r/

2

Nasals

/m, n, ŋ/

1

Fricatives

/θ, ð, f, v, s, z, ʃ, ʒ/

0

Occlusives

/p, t, k, b, d, g/

Selkirk (1984)15

10

a

/æ, αː, Λ/

9

e, o

/e, ɔ, ɔː/

8

i, u

/I, iː,,uː/

7

r

/r/

6

l

/l/

5

m, n

/m, n/

4

s

/s/

3

v, z, ð

/v, z, ð/

2

f, θ

/f, θ/

1

b, d, g

/b, d, g/

0.5

p, t, k

/p, t, k/

Harris (1994)7

5

Low vowels

/æ, αː Λ, e, ɔ, ɔː/

4

High vowels and glides

/I, iː, , uː, j, w/

3

Liquids

/l, r/

2

Nasals

/m, n, ŋ/

1

Fricatives

/θ, ð, f, v, s, z, ʃ, ʒ, h/

0

Plosives

/p, t, k, b, d, g/

Spencer (1996)1

5

Vowels

/æ, αː, Λ, e, ɔ, %ː, ə, əː, I, iː, , uː, aI, a, eə, eI, ɔI, ə, Iə, ə/

4

Glides

/j, w/

3

Liquids

/l, r/

2

Nasals

/m, n, ŋ/

1

Fricatives and affricates

/θ, ð, f, v, s, z, ʃ, ʒ, h, tʃ, dʒ/

0

Plosives

/p, t, k, b, d, g/