Hearing loss may begin suddenly, without any apparent external cause. To be more precise, this is a particular type of hearing loss
. The sounds that reach the ear are no longer converted into nerve impulses sent to the brain, as they would be in a healthy ear.
Symptoms often occur in one ear only, and are not accompanied by pain. The hearing loss may be so minimal that it goes unnoticed, or so great that it results in complete deafness. Acute hearing loss can affect anyone.