There are ranges of normal with sound production. The 24 consonant sounds can be broken into three groups of sound development: early, middle, late.
Early 8 Sounds
Emerge and mastered between the ages of 1-3
m, b, y, n, w, d, p, h
Middle 8 Sounds
Emerge and mastered between the ages of 3-6 ½
t, ng, g, k, f, v, ch, j
Late 8 Sounds
Emerge and mastered between the ages of 5 -7 ½
sh, s, th (in think0, th (in these), r, z, l, zh
Adapted from Shriberg’s Order of Speech-Sound Acquisition
Published on December 12, 2016 01:56