WILLIAM GAGE / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY WILLIAM GAGE / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Hearing aid testing. Young girl about to have her hearing aid assessed. A tiny microphone in her ear canal (not seen) measures the output of the hearing aid in response to sounds. This process, termed real-ear measurement, allows the audiologist to be sure that the sound she hears is being amplified correctly.
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