Case B was a 5-year-old boy with a severe to profound bilateral sensorineural congenital hearing loss. He wears binaural hearing aids, which at times do not provide adequate speech audibility due to an abnormality in the peripheral auditory system. B received some auditory verbal therapy through the school system. Initially, he performed poorly (below 72%) on final-consonant-voicing-distinctions (FCVD), initial-consonant-voicing-distinctions (ICVD), same-syllable-number-different-consonant/vowel information (SSN-DCV), and initial-consonant-manner-distinctions (ICMD) tasks of CD 1 of the Listen-Hear program (Normal Hierarchy of Speech Sound Acquisition Module).

Following initial testing, B was not assigned to any training task. During this six-week control period, he received only the regular amount of therapy provided by the school therapist. After the six-week assessment period, B completed six weeks of training in the home on FCVD, ICVD, and ICPD tasks of the Listen-Hear program. B's scores improved from pre-test to post-test. His FCVD score improved from 0% to 72% correct, ICPD improved from 45% to 61% correct, and FCPD improved from 45% to 69%.

Pre-, post-, and follow-up tests also included standardized measures. B's performance on the TAC remained stable between initial testing and the six-week assessment and improved between the post-test and follow-up tests. This indicates an improvement in B's discrimination abilities.

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