Zheng QY, Yan D, Ouyang XM, Du LL, Yu H, et al. (2005) Digenic inheritance of deafness caused by mutations in genes encoding cadherin 23 and protocadherin 15 in mice and humans
[journals.plos.org]
[…] born with profound congenital deafness.
[vdocuments.site]
The relative contribution of heredity to age-related hearing impairment is not known, however the majority of inherited late-onset deafness is autosomal dominant and non-syndromic
[en.wikipedia.org]