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Articulation and Phonology

A speech sound disorder occurs when mistakes continue past a certain age.  Each sound has a different range of ages when the child should make the sound correctly.  Speech sound disorders include problems with articulation (making the sounds) and phonological processes (sound patterns).


Speech Sound Developmental Chart  (Source:  Sander, Eric K. "When Are Speech Sounds Learned?"  JSHD, 37 February 1972)


p, m, h, n, w, b  (Ages 2-3)

k, g, d, t, ng (Ages 3-4)

f, y  (Ages 3-4)

r  (Ages 4-7.5)

l  (Ages4-6)

s (Ages 4-8)

ch, sh, (Ages 3.5-7)

z (Ages 3.5-8)

j (Ages 4-7)

v (Ages 4-8)

the th in thumb (Ages 4.5-7)

the th in this (Ages 4.5-8)

the sound heard in measure zh (Ages 5.5-8.5)
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Boyd County Public Schools
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Ashland, KY 41102
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