The term presbycusis refers to age-related, sensorineural hearing impairment in elderly individuals. Sensory presbycusis audiogram is thought to show a sharply sloping high-frequency loss extending beyond the speech frequency range, and clinical evaluation reveals a slow, symmetric, and bilateral progression of hearing loss.
What Causes Presbycusis?
Any audiologist in Melbourne opines that sensorineural hearing loss is caused by disorders of the inner ear or auditory nerve. Presbycusis is usually a sensorineural hearing disorder. It is most commonly caused by gradual changes in the inner ear. The cumulative effects of repeated exposure to daily traffic sounds or construction work, noisy offices, equipment that produces noise, and loud music can cause sensorineural hearing loss. This loss might be mild, moderate, or severe.
What Happens in Presbycusis?
A complex condition, presbycusis arises from multiple factors that, over multiple years result in progressive and symmetrical hearing loss. Characteristically, presbycusis involves bilateral high-frequency hearing loss associated with difficulty in speech discrimination and central auditory processing of information. However, other patterns of presbycusis do exist.
Extensive research has attempted to determine the pathologic changes of presbycusis, but the exact mechanisms remain unknown. Audiometric testing with pure-tone average and speech discrimination forms the cornerstone of diagnostic testing for presbycusis. Properly fitted hearing aids might contribute to the rehabilitation of a patient with presbycusis.
The loss associated with presbycusis is usually greater for high-pitched sounds. For instance, it might be difficult for someone to hear the nearby chirping of a bird or ringing of a telephone. However, the same person might be able to hear the low-pitched sound of a truck rumbling down the street.
There are many causes of presbycusis. Most commonly it arises from changes in the inner ear of a person as they age, but presbycusis can also result from changes in the middle ear or complex changes along the nerve pathways leading to the brain. Because the process of loss is gradual people who have presbycusis might not realize that their hearing is diminishing.
Conclusion
Presbycusis is an important problem in society. It occurs in an elderly population that relies on special senses to compensate for their age-associated disabilities.
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