Hyperacusis may be defined as a reduction of normal tolerance for everyday sounds. It is also defined as a collapse of the normal range of tolerance for sounds that is present in otherwise normally functioning ears. People with hyperacusis may find that certain sounds are more difficult to listen to than others, and some sounds may cause pain in the ears, even when those sounds don't bother others.  Often, the most disturbing or painful sounds can be sudden high pitched noises like alarms, bus brakes, silverware and dishes, children's screams, and clapping. Many sounds that were previously perceived as normally loud or non intrusive, can be painful, annoying, seem amplified, or irritating. This is a very frustrating situation for most people as sound and noise are present in nearly every work, social, or recreational settings!

Sometimes, hyperacusis can be so severe that people begin to avoid any public or social setting in an attempt to protect their ears from any sounds.  It can be very difficult for family members or medical providers to understand and support the person with hyperacusis, which cannot be seen in images, like a broken bone.