Speech sounds string together to form different words, which can be stringed into sentences and running conversation. Hence the basis of any spoken language is the system of myriad speech sounds that are produced/articulated in the mouth with the help of different articulators (parts of the mouth) As children grow, they learn to execute better oral motor control to articulate different speech sounds. Typically by the age of 6-7 yrs a child can pronounce almost all speech sounds correctly. Some kids who lag behind benefit from speech therapy.
I find the Phonetics Flash animation project (click here to get the link) very useful with those who have articulation errors.
Click here for pictoral descriptions of different speech sounds along with a few videos.
nice one
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