Listening & Spoken Language Development & Intervention
Speech Sound Development Chart
Estabrooks, W. (1998)
Cochlear Implants for Kids
. Washington DC: Alexander Graham Bell Association for the Deaf and Hard of Hearing.
Sander, E. K. (1972) When are speech sounds learned?
Journal Speech Hear Disorder
Horizontal bars indicate a range of typical sound development in children.
Alexander Graham Bell Association
UNC-CH Division of Speech and Hearing Sciences
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