Table 1: Hearing and age statistics for the ferrets with early hearing loss induced by ototoxic lesion (OT); all animals were male. The age of hearing onset in ferrets is ~32 days postnatally, and auditory critical period closure for A1 is 80 days [16].

ID no. Weight Age at OT lesion ABR hear threshold Age at recording Impairment duration BDA volume DJF 1 1.7 kg 49 days 65 dB SPL 148 days 99 days 0.5 μL DJF 3 2.3 kg 49 days 65 dB SPL 182 days 133 days 0.5 μL DJF 4 1.9 kg 49 days 85 dB SPL 190 days 141 days 0.5 μL