목적: Notched music therapy has been suggested to be effective for relieving tinnitus. We have developed a smartphone application using tailor-made notched music for tinnitus patients.This study aimed to evaluate the effect of this smartphone application on reducing tinnitus. 방법:A total of 26 patients who were chronically distressed by tinnitus with a >18 Tinnitus Handicap Inventory (THI) score were recruited from March 2013 to March 2015. Patients were instructed to listen to tailor-made notched music through our smartphone application for 30–60 min per day for 3 months. Treatment outcome was evaluated using the Tinnitus Handicap Inventory (THI), a visual analogue scale for tinnitus. According to the differences between their pre- and post-treatment THI scores, the patients were classified into the effective and non-effective groups. Demographic data—including age, sex, duration of tinnitus, Beck Depression Inventory (BDI) score, State Anxiety Inventory (SAI) score, Trait Anxiety Inventory (TAI) score, and Pittsburgh Sleep Quality Index (PSQI) score—were compared between the effective and non-effective groups. 결과:After 3 months, smartphone application-delivered notched music therapy significantly improved the THI score from 33.9 ± 18.9 to 23.08 ± 15.17 (P = 0.03); the effect was particularly marked for the emotional score of the THI (P = 0.02). There were significant differences in duration of tinnitus (P = 0.002), initial THI score (P = 0.02), and BDI score (P = 0.05) between the effective and non-effective groups. 결론:Chronic tinnitus patients who underwent smartphone application-delivered notched music therapy showed improved THI scores, particularly the emotional score of the THI. This therapy was more effective in tinnitus patients with a longer duration of tinnitus, higher initial THI score, and higher BDI score.