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(A) Hearing level as a function of age. Pure-tone hearing level increases with age, and higher frequencies are affected more than the lower frequencies
(adapted from Glorig A, Davis H. Age, noise and hearing loss. Ann Otol Rhinol Laryngol 1961;70:5571). (B) Speech discrimination as a function of age.
For a given pure-tone hearing loss, the speech discrimination decreases with aging (adapted from Jerger J. Audiologic findings in aging. Adv
Otorhinolaryngol 1973;20:115). (C) Total ganglion cell population versus age. There is progressive loss of cochlear neurons as a function of aging
(adapted from Otte J, Schuknecht HF, Kerr AG. Ganglion cell populations in normal and pathological human cochleae. Implication for cochlear
implantation. Laryngoscope 1978;88:1234).
Source: Chapter 53. The Aging Inner Ear, CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e
Citation: Lalwani AK. CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e; 2012 Available at:
http://mhmedical.com/ Accessed: May 06, 2017
Copyright © 2017 McGraw-Hill Education. All rights reserved
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