Long-term changes in music perception in Korean cochlear implant listeners
AbstractThe purpose of this study was to assess long-term post-implant changes in music perception in cochlear implant (CI) listeners using the Korean version of the Clinical Assessment of Music Perception (K-CAMP) test and questionnaire for music listening. Twenty-seven patients, including 5 men and 22 women participated in this prospective study. Their music perception ability was evaluated with the K-CAMP test which consists of pitch discrimination, melody, and timbre identification. Also, a questionnaire was used to quantify listening habits, and level of musical experience. Median postoperative durations of the first and second test were 12.8 and 30.9 months. Participants were divided into two groups: good or poor performance in the first test with reference to the average of each performance. Among the demographic factors, the good performance group was younger than the poor performance group at the time of the test, and the ability of pitch discrimination decreased with aging at 262 Hz for the first test and at 391 Hz for the second test. Pitch discrimination in the second test in the good performance group showed no difference with the first test, but in the poor performance group, the pitch discrimination score significantly improved. Similarly, timbre test results significantly improved in the poor performance group. In the melody identification test, the two groups showed no change at the second test. Scores for listening habit and level of musical experience significantly decreased postoperatively and did not recover during the follow-up period. The pitch discrimination and timbre identification ability improved in the CI listeners who had poor ability shortly after surgery. However, the ability of melody identification showed no difference in both groups after the lapse of time. Age was related to pitch discrimination and younger people showed good performance. Listening habits and level of musical experience decreased after CI surgery without time-dependent improvement.
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