inability of the ears, due to aging, to focus on high-pitched sounds
Presbycusis, or age-related hearing loss, is the cumulative effect of aging on hearing. It is a progressive bilateral symmetrical age-related sensorineural hearing loss. The hearing loss is most marked at higher frequencies. Hearing loss that accumulates with age but is caused by factors other than normal aging is not presbycusis, although differentiating the individual effects of multiple causes of hearing loss can be difficult.
U.S. National Library of Medicine
Gradual bilateral hearing loss associated with aging that is due to progressive degeneration of cochlear structures and central auditory pathways. Hearing loss usually begins with the high frequencies then progresses to sounds of middle and low frequencies.
The numerical value of presbycusis in Chaldean Numerology is: 1
The numerical value of presbycusis in Pythagorean Numerology is: 3
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"presbycusis." Definitions.net. STANDS4 LLC, 2018. Web. 22 Apr. 2018. <https://www.definitions.net/definition/presbycusis>.