Abstract
Speech and language proficiency of two children whose main complaint was unintelligible speech was evaluated. Case 1 was a boy with Noonan syndrome. He showed nasopharyngeal articulation and immature articulation at the age of 5. However, his speech was characterized by hyper-hyponasality, hoarseness, and distorted /i/ sounds at eight. Additional examinations revealed that he had minor malformation of pharynges. Case 2 was a 6 year-old boy with inconsistent phonemic errors. He was found to have some disturbances in auditory information processing and phonological handling in speech. After phonological and semantic approach through hiragana letters for 8 months, he showed remarkable improvement in his speech. The two case studies suggested that factors in unintelligible speech should be identified case by case.
