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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 ().
Auditory sensitivity changes when the duration of a sound becomes less than 1 second. The threshold intensity decreases by about 10 dB when the duration of a tone burst is increased from 20 to 200 ms. For example, suppose that the quietest sound a subject can hear is 16 dB SPL if the sound is presented at a duration of 200 ms.
Hyperesthesia is a condition that involves an abnormal increase in sensitivity to stimuli of the senses.Stimuli of the senses can include sound that one hears, foods that one tastes, textures that one feels, and so forth.
People with misophonia display hypersensitivity to certain pattern-based noises such as the sound of chewing, slurping, finger tapping, foot shuffling, throat clearing, pen clicking, and keyboard tapping; people with misophonia respond to triggering sounds with emotional distress and increased hormonal activity of the sympathetic system. [18]
Bell's palsy can trigger an increased sensitivity to sound known as hyperacusis. [6] The cause of Bell's palsy is unknown [1] and it can occur at any age. [4] Risk factors include diabetes, a recent upper respiratory tract infection, and pregnancy. [1] [7] It results from a dysfunction of cranial nerve VII (the facial nerve). [1]
Annoyance effects of noise are minimally affected by demographics, but fear of the noise source and sensitivity to noise both strongly affect the 'annoyance' of a noise. [42] Sound levels as low as 40 dB(A) can generate noise complaints [43] and the lower threshold for noise producing sleep disturbance is 45 dB(A) or lower. [44]
Saccular acoustic sensitivity is a measurement of the ear's affectability to sound. The saccule's normal function is to keep the body balanced, but it is believed to have some hearing function for special frequencies and tones. Saccular acoustic sensitivity is considered to be simply an extension of the sense of hearing through the use of the ...
Although research is limited, it suggests that increased exposure to loud noise through personal listening devices is a risk factor for noise induced hearing loss. [ 35 ] [ 36 ] A systematic review of adolescents and young adults reports that over half of the research subjects had been exposed to sound through music exposure on personal devices ...