WHRN and deafness: However, the proportions of deafness in Whrn+/− mice were much higher than in WT even at 1–2 months old (n = 54–67, click: 13.43%, 4 kHz: 24.07%, 8 kHz: 18.18%, 16 kHz: 25.76%, 32 kHz: 68.18%) and distinctly increased with ages.