Auditory hallucinations have been found to happen with a wide range of different physiological and emotional states. We have all felt like we've had some kind of auditory hallucination at one time or the other. The occurrence of auditory hallucinations seems to suggest that there are different types of auditory hallucinations. Some are fleeting and happen once in a while, while others, which we are more concerned with at this site are chronic and disrupt the normal experince of life. Population studies show that hallucinations are generally disributed equally among the general population.
Auditory hallucinations have been reported to occur in conjuction with sensory defects. By this we mean ear and auditory defects. When we think of ear defects we automatically think of deafness. Indeed, auditory hallucinations have been shown to increase in patients with progressive deafness.There are 2 types of typical progressive deafness: conductive deafness and nerve deafness. A common trend in auditory disorders seems to be that they occur when there is a reduction in sensory stimulation.
Auditory hallucinations are known to happen when there is food and water deprivation. A high or low brain temperature may also induce auditory hallucinations. Most people have had experiences when they are extremely hungry or thirsty and have thought they heard someone call them or they heard their name. Sleep deprivation can also contribute to having auditory hallucinations. Sometimes holding your breath or hyperventilating can induce auditory hallucinations.
Many medical conditions like cardiovascularand endocrine, infections, pulmonary disease, gastrointestinal disorders, anemic disease and central nervous system disorders have been implicated. A study has shown that auditory disorders occur more often in women than in males and most of these had hearing impairments (Pasquini, 1997).
Auditory hallucinations seem to occur in conjuction with all of these conditions and so does not display a unique set of conditions which triggers it. Research has been done to determine how to predict what would trigger an auditary hallucination and a simple answer to the question "when do they occur?" is not currently known.