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The shape of the audiogram resulting from pure-tone audiometry gives an indication of the type of hearing loss as well as possible causes. Conductive hearing loss due to disorders of the middle ear shows as a flat increase in thresholds across the frequency range. Sensorineural hearing loss will have a contoured shape depending on the cause.
Hearing loss is a partial or total inability to hear. [5] Hearing loss may be present at birth or acquired at any time afterwards. [6] [7] Hearing loss may occur in one or both ears. [2] In children, hearing problems can affect the ability to acquire spoken language, and in adults it can create difficulties with social interaction and at work. [8]
Occupational hearing loss is present in up to 33% of workers overall. [43] Occupational exposure to noise causes 16% of adult disabling hearing loss worldwide. [44] The following is a list of occupations that are most susceptible to hearing loss: [41] Agriculture; Mining; Police; Construction; Manufacturing; Utilities; Transportation; Military ...
The National Institute on Deafness and Other Communication Disorders (NIDCD), a member of the U.S. National Institutes of Health, is mandated to conduct and support biomedical and behavioral research and research training in the normal and disordered processes of hearing, balance, smell, taste, voice, speech, and language. The institute also ...
Either hearing loss is a significant risk factor for driving and should prevent or limit people from driving, or it’s not a risk factor and deaf drivers shouldn’t face any additional hurdles ...
Hearing loss is most common in older adults (presbycusis). People with normal hearing can also hear sounds outside of the speech banana , including both lower-pitched sounds (such bass musical notes and rumbling noises) and higher-pitched sounds (such as very high musical notes, the rustling of leaves, and the chirping of birds).
Cerebral deafness (also known as cortical deafness or central deafness) is a disorder characterized by complete deafness that is the result of damage to the central nervous system. The primary distinction between auditory agnosia and cerebral deafness is the ability to detect pure tones, as measured with pure tone audiometry.
In some cases the cause is unknown. However, there are various known causes of speech impairments, such as hearing loss, neurological disorders, brain injury, an increase in mental strain, constant bullying, intellectual disability, substance use disorder, physical impairments such as cleft lip and palate, and vocal abuse or misuse. [12]