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hearing loss of aging

Presbycusis Audiology The progressive loss of high pitch auditory discrimination seen in advanced age, affecting ±50% of those > age 75. See Hearing loss.
Hearing loss types
Conductive HL caused by damage to any mechanical components of the ear, eg accumulation of cerumen, disruption of tympanic membrane, fusion of one or more middle ear ossicles; conductive HLs may be amenable to surgery
Sensorineural HL due to a defect in the neural pathways, which may be at the level of the cochlea, auditory nerve, or in the cerebral cortex Etiology Infections–especially intrauterine, eg rubella, drug toxicity, eg aminoglycosides, and tumors, eg acoustic neuroma
Mixed HL due to a combination of mechanical and neural defects Etiology Down syndrome, cystic fibrosis, cerebral palsy
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
But it should be pointed out that antistatic behavior is quite different from conductive behavior of conductive materials.
* ARcare[R] 90447, an electrically conductive, non-woven, nickel-free material coated with an electrically conductive adhesive on both sides with a white, double-coated release liner.
It also houses the National Library of Conductive Education as a focus of research and development.
Comprehensive analysis with respect to price trends that are expected to impact the outlook of the global conductive plastic compounds market between 2018 and 2026
| Staff and children at Steps wore blue clothing to raise awareness for Conductive Education week.
Polyurethanes with different structures were prepared from polyols (PEG and PCL) and diisocyanates (HDI and TDI) and the conductive nanofillers and nanocapsules as healing materials were further dispersed into polyurethane matrixes in order to prepare the as-mentioned adhesives.
[8] investigated the electrical conductivity of asphalt mixture containing conductive carbon fibers, carbon black, and graphite as conductive media and demonstrated that conductive fibers improve conductivity more effectively than adding conductive filler.
Conductive paints and coatings are widely used in the production of electronic products and in a number of applications in other industries.