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Effects of Aging on the Ears, Nose, and Throat
Aging greatly affects the function of the ears, nose, and throat. The effects of aging result from many factors such as wear and tear caused by overuse of the voice, exposure to loud noise, and the cumulative effect of infections, as well as the effect of substances such as drugs, alcohol, and tobacco.
A progressive loss of hearing (presbycusis—see Changes in the Body With Aging : Ears), especially for higher-pitched sounds, is common. Hearing impairment is common among older adults, and the rate of hearing impairment increases with age. Over one quarter of people age 65 years and older have hearing impairment. By age 75, one third of people have signs of hearing impairment. Hearing impairment can alter a person's ability to understand speech. Vestibular imbalance and ringing in the ears (tinnitus—see Ear Ringing or Buzzing) are also more common among older people but are not normal. Changes occur because some structures in the ear that help with hearing or balance deteriorate slightly or a tumor or disorder may have developed. Hearing aids can help people with hearing loss hear better.
The sense of smell may decline with age, making tastes less distinct (see Changes in the Body With Aging : Mouth and Nose). Changes in the voice also occur with age. The tissues in the larynx may stiffen, affecting the pitch and quality of the voice and causing hoarseness. Changes in the tissues of the throat (pharynx) may lead to the leakage of food or fluids into the trachea during swallowing (aspiration). If persistent or severe, aspiration may cause pneumonia.
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