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Speech Sound DisordersBasic Articulation (speech sound) Development
(There are a few slight variations)The one that seems to be consistent has been as follows:
By 3 1/2 to 4 years = Should have p, m, b, t, d, h, w, y, n
By 5 to 5 1/2 years = Should have k, g, f, v, some s sounds
By 6 1/2 to 7 years = Should have I, th, ng, some sh, ch, and j sounds
By 8 to 8 1/2 years = Should have r, and the rest of the speech soundsThis information is from ASHA (American Speech-Language-Hearing Association) but general sound development
By 3 months = Makes cooing sounds
By 5 months = Laughs and makes playful sounds
By 6 months = Makes speech-like babbling sounds like puh, ba, mi, da
By 1 year = Babbles longer strings of sounds like mimi, upup, bababa
By 3 years = Says m, n, h, w, p, b, t, d, k, g, and f in words
By 4 years = Says y and v in words may still make mistakes on the s, sh, ch, j ng, th, z, I, and r sounds. Most people understand the child's speech.