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It is typically experienced as a secondary symptom of sensorineural hearing loss, although not all patients with sensorineural hearing loss experience diplacusis or tinnitus. [ 1 ] [ 2 ] The onset is usually spontaneous and can occur following an acoustic trauma , for example an explosive noise, or in the presence of an ear infection . [ 3 ]
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]
A 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...
Consequently, perceptual distortions can occur (e.g. slow motion/ tunnel vision, disruption of hearing) As a part of this, the processing of auditory information can be stopped completely, causing temporary hearing loss. However, it is more common that the auditory cortex's functionality still remains but its efficiency is impaired.
Tinnitus is described as hearing a sound when an external sound is not present. [13] Noise-induced hearing loss can cause high-pitched tinnitus. [14] An estimated 50 million Americans have some degree of tinnitus in one or both ears; 16 million of them have symptoms serious enough for them to see a doctor or hearing specialist.
Dysacusis is a hearing impairment characterized by difficulty in processing details of sound due to distortion in frequency or intensity rather than primarily a loss of the ability to perceive sound. [1] The term is sometimes used to describe pain or discomfort due to sound, a condition also known as auditory dysaesthesia. [2]
Researchers suspected her hearing loss as a factor for developing the hallucinations. Moreover, through further analysis the patient was found to have a medical history of hypertension, hyperlipidemia, and atrial fibrillations. Cases are commonly found in the elderly, but in one case a 29-year-old woman reported hearing music for one week.
Hyperacusis is an increased sensitivity to sound and a low tolerance for environmental noise. Definitions of hyperacusis can vary significantly; it often revolves around damage to or dysfunction of the stapes bone, stapedius muscle or tensor tympani ().