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Auditory hallucinations have been known to manifest as a result of intense stress, sleep deprivation, and drug use. [14] Auditory hallucinations can also occur in mentally healthy individuals during the altered state of consciousness while falling asleep (hypnagogic hallucinations) and waking up (hypnopompic hallucinations). [27]
Musical hallucinations can occur in people who are physically and mentally healthy, and for them, there is no known cause. [7] Most people find their musical hallucinations obtrusive, and wish to be rid of them, while others welcome them. In addition, investigators have pointed to factors that are associated with musical hallucinations.
Hypnagogic hallucinations are often auditory or have an auditory component. Like the visuals, hypnagogic sounds vary in intensity from faint impressions to loud noises, like knocking and crashes and bangs (exploding head syndrome). People may imagine their own name called, crumpling bags, white noise, or a doorbell ringing.
Individuals with exploding head syndrome hear or experience loud imagined noises as they are falling asleep or are waking up, have a strong, often frightened emotional reaction to the sound, and do not report significant pain; around 10% of people also experience visual disturbances like perceiving visual static, lightning, or flashes of light.
A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [6] They are distinguishable from several related phenomena, such as dreaming (), which does not involve wakefulness; pseudohallucination, which does not mimic real perception, and is accurately perceived as unreal; illusion, which involves distorted or misinterpreted real ...
Musical hallucinations (MH) can be described as perceptions of musical sounds in the absence of external auditory stimuli. Although imagined sounds can be non-musical; such as bells, whistles and sirens, case studies indicate that music "[takes] precedence over all other auditory hallucinations" (Sacks, 2006).
However, that does not prevent people from being fooled by auditory illusions. Sounds that are found in words are called embedded sounds, and these sounds are the cause of some auditory illusions. A person's perception of a word can be influenced by the way they see the speaker's mouth move, even if the sound they hear is unchanged. [10]
Musical ear syndrome (MES) is a condition seen in people who have hearing loss and subsequently develop auditory hallucinations. "MES" has also been associated with musical hallucinations, which is a complex form of auditory hallucinations where an individual may experience music or sounds that are heard without an external source. [1]