presbycusis

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presbycusis

 [pres″be-ku´sis]
progressive, bilaterally symmetrical perceptive hearing loss occurring with age; it usually occurs after age 50 and is caused by structural changes in the organs of hearing. Initially, changes in the inner ear, such as degeneration of hair cells and changes in the basilar membrane, lead to decreased hearing at higher tones and a decline in pitch discrimination. As hearing continues to be lost, even lower pitch tones become harder to hear.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pres·by·a·cu·sis

, presbyacusia (prez'bē-ă-kū'sis, -kū'sē-ă),
Loss of hearing associated with aging; manifest as reduced ability to perceive or discriminate sounds; the pattern and age of onset vary. See: phonemic regression.
[presby- + G. akousis, hearing]
Farlex Partner Medical Dictionary © Farlex 2012

presbycusis

Age-related hearing loss Audiology A progressive loss of hearing 2º to age-related changes in the inner or middle ear, beginning with high-frequency sounds–eg, speech, which may have a genetic predisposition, as it tends to occur in families; it occurs ±25% > age 65 to 75 yrs old, 50%  > age 75. See Hearing loss.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

pres·by·cu·sis

(prez'bē-kyū'sis)
A usually gradual, frequently bilateral sensorineural or conductive hearing loss often related to the middle ear that gradually occurs in most people as they age; usually more pronounced for high-pitched sounds; the pattern and age of onset may vary.
Synonym(s): presbyacusis, presbyacusia.
[G. presbys, old man, + akousis, hearing]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

pres·by·cu·sis

(prez'bē-kyū'sis)
A usually gradual, frequently bilateral sensorineural or conductive hearing loss often related to the middle ear that gradually occurs in most people as they age; usually more pronounced for high-pitched sounds.
[G. presbys, old man, + akousis, hearing]
Medical Dictionary for the Dental Professions © Farlex 2012