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Eighty-one patients completed the study. Hearing thresholds remained the same throughout the study. APHAB results showed a significant benefit (p & 0.001) in categories of ease of communication, reverberation, background noise, and global score. The SSD questionnaire showed a high satisfaction among participants, with 93.8% of patients likely to recommend the IOBC. Dissatisfaction was highest with regard to patient's ability to eat with device, with only 55.6% satisfied. No serious adverse events were reported during the study.