Hearing Loss

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Hearing loss is the inability to perceive the presence of a sound at normal hearing levels. This can be caused by a number of factors, including noise exposure, age, genetics, medications, trauma, and infections. Hearing loss varies across individuals.

An audiogram shows the results of a hearing test. The audiogram lists intensity levels on one axis and frequencies (pitches) on the other. There are 4 levels of hearing loss: mild, moderate, severe, and profound. A person with “mild hearing loss” will miss many parts of speech, which can cause communication difficulties.

Audiogram explained, Healthy Hearing (webpage)

Audiogram showing frequency and hearing level
Graphic Credit: Washington University https://oto.wustl.edu/washu-leads-effort-to-standardize-the-common-sounds-audiogram/
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