Speech Sound Development Chart
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1Speech Sound Development
Norms taken from Goldman Fristoe Test of Articulation, Second Edition (2000)
By age 2...
Overall Intelligibility:
Initial Sounds
Medial Sounds
Final Sounds
Understood ~50% of the time
/b,d,h,m,n,p/
/b,m,n/
/m,p/
by unfamiliar listeners.
By age 3...
Overall Intelligibility:
Initial Sounds
Medial Sounds
Final Sounds
Understood ~75% of the time
/f,g,k,t,w/
/f,g,k,p,t/ and "ng"
/b,d,g,k,n,t/
by unfamiliar listeners.
(as in "singer")
Generally "marking"
all final consonants.
By age 4...
Overall Intelligibility:
Initial Sounds
Medial Sounds
Final Sounds
Understood almost 100% of
/kw/
/d/
/f/
the time by unfamiliar
Consonant clusters
listeners.
begin to emerge
Marking all syllables in words.
By age 5...
Overall Intelligibility:
Initial Sounds
Medial Sounds
Final Sounds
Speech begins to sound like
/l,s,bl/ "ch," "j," (as
/l,s,z/ "ch," "j" (as
/l,s,r,v,z/ "ng," (as
that of an adult
in "jump") "sh" and
in "pajamas") and
in ring) "ch," "j,"
"y"
"sh"
(as in "smudge")
and "sh"
Later-developing sounds
By age 6...
By age 7...
Children begin to develop the remainder of their /r/
Children begin to develop voiced and voiceless "th" in all
sounds.
positions of words.
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Parent category: Medical