In the US there is no law prohibiting Deaf from driving, so long as they pass the requirements for all other drivers (vision testing, behind the wheel, written test etc). Shortly after I lost my hearing I renewed my license with only the vision screening.
Years ago, before they became standard equipment, deaf were required to have dual outside mirrors.
Frankly, I think I'm a safer driver now, since I'm less distracted by the cell phone, radio, chit-chat, and so forth.
What's up, Doc?