It is estimated that by over million people — or one in every ten people — will have disabling hearing loss. Approximately one third of people over 65 years of age are affected by disabling hearing loss. A person who is not able to hear as well as someone with normal hearing — hearing thresholds of 25 dB or better in both ears — is said to have hearing loss. Hearing loss may be mild, moderate, severe, or profound. It can affect one ear or both ears, and leads to difficulty in hearing conversational speech or loud sounds. People who are hard of hearing usually communicate through spoken language and can benefit from hearing aids, cochlear implants, and other assistive devices as well as captioning.
Obsessions are persistent, intrusive and unwanted thoughts, images or impulses urges. Someone with OCD usually knows that that his or her obsessions are irrational, senseless, or inappropriate, but he or she is not able to control them. This causes very high degrees of anxiety. Compulsions are repeated behaviours that the person performs in order to decrease the anxiety caused by the obsession.
The authors do not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment. Republish our articles for free, online or in print, under Creative Commons licence. But what is less well-known about these voices and visions is that they are surprisingly common — especially when growing up.
By Rachel Aviv. For the past four years, Jahi McMath has breathed with the help of a ventilator. Audio: Listen to this story. To hear more feature stories, download the Audm app for your iPhone.