Case C was a 5-year-old boy with a moderately-severe sensorineural congenital hearing loss bilaterally who wore binaural hearing aids. He was receiving no auditory verbal therapy at the time of testing.

Initial testing included 5 subtasks of the TAC, on which C fell within the mean for his age and type of hearing loss. Listen-Hear training involved CD 1 (Normal Hierarchy of Speech Sound Acquisition Module) for a six-week period. He was tested again at three weeks into training (a mid-test) in addition to the post-test after the six weeks of training. Mid- and post-tests included eight subtasks of the TAC. After three and six weeks of training, he had improved to two standard deviations above the mean for his age group.

Pre-, mid-, and post-tests were also conducted using the Goldman-Fristoe -Woodcock Test of Auditory Discrimination Subtest – In Quiet (GFWAD). From p re-test to mid-test and post-test, E showed improvement in the form of a reduction of the number of errors made (pre-test – 13 errors; mid-test – 7 errors; post-test – 10 errors).

C was also tested on speech production measures using the Goldman-Fristoe Test of Articulation (GFAT) – Subtest in Words. His articulation performance in words improved over the six-week period. The number of errors and the degree of severity of the error decreased between pre- and post-testing. C had similar errors in speech perception and production. This combined with his improvement in speech intelligibility performance suggests that speech perception training using Listen-Hear assisted in the development of C's speech perception and speech production skills.

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