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Figure 2: Mean thresholds of auditory brain stem response (ABR, a) and mean responses of distortion product otoacoustic emission (DPOAE, b) in each group, immediately after noise exposure. Unplugged ear of G3 (group of unilateral ear plug) and noise control group (G4) show signifi cantly higher mean ABR thresholds and lower responses at DPOAE

Figure 2: Mean thresholds of auditory brain stem response (ABR, a) and mean responses of distortion product otoacoustic emission (DPOAE, b) in each group, immediately after noise exposure. Unplugged ear of G3 (group of unilateral ear plug) and noise control group (G4) show signifi cantly higher mean ABR thresholds and lower responses at DPOAE