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Figure 1: Inclusion/exclusion criteria. Subjects who did not fulfill requirement or who had missing data were excluded from analysis at each step. PTA = pure tone audiometry, HL = hearing loss, PMP = personal music player, SNR = signal-to-noise ratio

Figure 1: Inclusion/exclusion criteria. Subjects who did not fulfill requirement or who had missing data were excluded from analysis at each step. PTA = pure tone audiometry, HL = hearing loss, PMP = personal music player, SNR = signal-to-noise ratio