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Adults, as well as children, experience hearing loss if the sound intensity is loud enough. According to the NIH, data from 2005-2006 estimated that 17% of teenagers had noise-induced hearing loss ...
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 ...
Noise-induced hearing loss is a permanent shift in pure-tone thresholds, resulting in sensorineural hearing loss. The severity of a threshold shift is dependent on duration and severity of noise exposure. Noise-induced threshold shifts are seen as a notch on an audiogram from 3000 to 6000 Hz, but most often at 4000 Hz. [16]
Noise-induced and age-related hearing loss are the most common forms of hearing loss seen in adult patients and they often co-exist in the same patients. In collaboration with M. Charles Liberman and other researchers, Kujawa has examined the vulnerability of the synapses that connect hair cells in the cochlea to auditory nerve fibers.
Hearing loss that worsens with age but is caused by factors other than normal aging, such as noise-induced hearing loss, is not presbycusis, although differentiating the individual effects of multiple causes of hearing loss can be difficult. One in three persons have significant hearing loss by age 65; by age 75, one in two.
Avoiding exposure to loud noise can help prevent noise-induced hearing loss. [95] 18% of adults exposed to loud noise at work for five years or more report hearing loss in both ears as compared to 5.5% of adults who were not exposed to loud noise at work. [96]