Type | MGI:General | Description | at 3 to 12 weeks of age, mice showed a significant hearing loss, compared to heterozygous and control mice, for all frequencies tested; it ranged from 30 dB to more than 70 dB, with an average of 30 dB at 8 kHz, 31 dB at 16 kHz, and 36 dB at 32 kHz |