Hallucinations are the states at which person perceives nonexistent objects as real. There are visual, auditory, olfactory, gustatory and tactile hallucinations. Auditoryhallucinations are most widespread. The person hears separate sounds, knocks, calls, talk. Voices happen silent and loud, familiar and unfamiliar, their content is unpleasant: voices threaten, abuse, promise to punish or do [...]