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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 (also known as auditory hallucinations, auditory Charles Bonnet Syndrome, and Oliver Sacks' syndrome [1]) describes a neurological disorder in which the patient will hallucinate songs, tunes, instruments and melodies. These hallucinations are not correlated with psychotic illness. [2]
These hallucinations are the most common type of hallucination, with auditory verbal hallucinations being more common than nonverbal. [19] [20] Elementary hallucinations are the perception of sounds such as hissing, whistling, an extended tone, and more. [21] In many cases, tinnitus is an elementary auditory hallucination. [20]
It is often due to diffuse axonal injury and demyelination. There may be peripheral and central symptoms, such as reduced auditory understanding in a complex listening environment, central auditory processing disorder and auditory hallucination. [23] Hyperacusis, that is the hypersensitivity to environmental noise can also develop. [24]
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.
Auditory hallucinations are often depicted as malicious voices that possess knowledge about the person's private and shameful thoughts or actions, which the individual would prefer to keep hidden. In these situations, thought broadcasting arises as an inability to conceal one's own thoughts. [29]
Alcoholic hallucinosis develops about 12 to 24 hours after the heavy drinking stops suddenly, and can last for days. It involves auditory and visual hallucinations, most commonly accusatory or threatening voices. [4] The risk of developing alcoholic hallucinosis is increased by long-term heavy alcohol abuse and the use of other drugs. [5]
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).