Hearing loss in no-tinnitus and tinnitus animals.

Hearing loss (in dB) in no-tinnitus and tinnitus animals following 1 h or 1.5 h exposure using click- and frequency-specific stimuli. Animals were either exposed to 120 dB SPL, 10 kHz for 1 h and analyzed after 6 d or exposed for 1.5 h and analyzed after 30 d. The groups are subdivided in tinnitus animals and no-tinnitus animals. A significant difference in hearing threshold was observed between no-tinnitus and tinnitus animals following exposure at stimulus frequencies of 11.3 kHz and above (*: p<0.05, **: p<0.01, ***: p<0.001).