Sonority (O. Jesperson ) О. Jespersen established the scale of sonority of sounds, that is, the scale of their inherent prominence Scale of Sonority 1. low vowels /а:, o:, υ, æ/ 2. mid vowels /e, з:, ə, Λ/ 3. high vowels /i:, ı, u:, u/ 4. semi-vowels /w, j/ 5. sonorants /1, r, m, n, n/ 6. voiced constrictive consonants /v, z, 3, ð/ 7. voiced plosive consonants /b, d, g/ 8. voiceless constrictive consonants and affricates /f, tς, d3, f, s, h, θ/ 9. voiceless plosive consonants /p, t, k/