Outcomes profile for the left ear of a participant (10T) in the full-treatment protocol who described pronounced loudness adaptation to sound therapy after initial activation of his power sound generators. The legend is otherwise the same as that described in Fig. 3. Abbreviations: AI, Articulation Index; HA, hearing aid; dB HL, decibels hearing level; RAU, rationalized arcsine units; STEPS, Speech Test Evaluation and Presentation System; UCL, uncomfortable loudness; WRS, word recognition score.