Heard But Not Seen: Tinnitus and Auditory Hallucinations.

The article compares tinnitus, a humming, tonal-type sound of any pitch, and auditory hallucinations, a noise heard only by the person experiencing the event. Statistics on the number of people who suffer from tinnitus in the U.S. are provided. The medical conditions associated with auditory hallucinations are identified. Also mentioned are the causes of auditory hallucinations and determining the root cause as the first step to managing the condition.