Aging is decline progressive or the disappearance function network And organs over time due to the accumulation of adverse biological changes. gradually. Process aging own three component different that is biological degeneration, extrinsic damage, and intrinsic damage. These factors depend on genetics and general susceptibility to age-related diseases. 1 -13
Presbycusis originate from Language Greece that is prebys It means age, And ákousis is hearing. Presbycusis is a hearing loss that accompanies the aging process. Pure tone audiometry shows a picture of bilateral symmetrical hearing loss that begins at high tones and is sensorineural in nature with no underlying abnormalities other than the general aging process. 14