 Cerebral palsy CP encompass a group of non-progressive, non-contagious motor conditions that cause physical disability in human development. It is not infrequently to note concurrent impairment in sensory, intelligence, vision and auditory in those patients. Many studies have documented Cerebral palsy is associated with a variety of neuromotor disorders that frequently affect the speech production system. The speech function impairment varied widely due to different severity of diseases involved. The investigators hypothesize such impairment of speech function may affect degree of social participation and eventually the quality of life QoL. 