Tinnitus

Many people with hearing loss have tinnitus.  Tinnitus is the sensation of hearing ringing, buzzing, hissing, chirping, whistling, or other sounds. The noise can be intermittent or continuous, and can vary in loudness. It is often worse when background noise is low, so you may be most aware of it at night when you're trying to fall asleep in a quiet room.

Tinnitus is very common.  For most people, the condition is merely an annoyance. However, tinnitus can cause people to have difficulty concentrating and sleeping.

Although tinnitus is often associated with hearing loss, it does not cause the loss, nor does a hearing loss cause tinnitus. In fact, some people with tinnitus experience no difficulty hearing, and in a few cases they even become so acutely sensitive to sound (hyperacusis) that they must take steps to muffle or mask external noises.