*2.5. Questionnaires*

The musical questionnaire was a simplified version of Munich Music Questionnaire (MMQ, 42) to limit the duration of each session. The questions concerned the musical experience in daily life through the average time of daily music listening, sound quality, instrument recognition, importance or implication of musical activities in the past and present (Table 2), and the sound and music perception by their CI before inclusion (Table 3). For this question, CI experience was compared to the period before implantation with still some degree of functional hearing for the progressive congenital or acquired diseases.
