Musical hallucination (MH) is the experience of hearing music when nothing is being played. While hearing sounds that no one else hears is somewhat common, actually hearing music versus a buzzing or ringing sound is much more rare and complex. These hallucinations are more common in women than in men and happen most often in individuals over the age of 60. While there are no specific causes for MH, in rare and serious cases, it can be caused by problems with blood vessels in the brain or by brain tumors. For more information about MH, you can either visit Clinical Geriatrics or read through these particular articles: Nonpsychotic Auditory Musical Hallucinations in Elderly Persons with Progressive Deafness and A Case of Musical Hallucinations.