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At least 8.5 per 1000 children younger than age 18 have sensorineural hearing loss. General hearing loss is proportionally related to age. At least 314 per 1000 people older than age 65 have hearing loss. Several risk factors for sensorineural hearing loss have been studied over the past decade.
Long-term exposure to noise and some medical conditions can also play a role. In addition, new research suggests that certain genes make some people more susceptible to hearing loss as they age. [10] Other risk factors include preexisting noise-induced hearing loss and exposure to ototoxic medications. [11]
Hearing loss due to chemicals starts in the high-frequency range and is irreversible. It damages the cochlea with lesions and degrades central portions of the auditory system. [45] For some ototoxic chemical exposures, particularly styrene, [46] the risk of hearing loss can be higher than being exposed to noise alone.
There are three main types of hearing loss: conductive hearing loss, sensorineural hearing loss, and mixed hearing loss. [3] About half of hearing loss globally is preventable through public health measures. [2] Such practices include immunization, proper care around pregnancy, avoiding loud noise, and avoiding certain medications. [2]
Late-life depression is often underdiagnosed, which is due to numerous reasons, including that depressed mood is commonly not as prominent as other somatic and psychotic symptoms such as loss of appetite, disruptions in sleep, lack of energy or anergia, fatigue, and loss of interest and enjoyment in normal life activities.
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]
However, younger people can also experience hearing loss, with about 15.5% of those over 20 being affected, especially if your profession increases the risk of damage. The best hearing aids can ...
The severity of hearing loss varies and can change over time. It can affect one ear (unilateral) or both ears (bilateral). Degrees of hearing loss range from mild (difficulty understanding soft speech) to profound (inability to hear even very loud noises). The loss may be stable, or it may progress as a person gets older. Particular types of ...