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    How Does a Hearing Screening Machine work?

    0  Views: 240 Answers: 1 Posted: 12 years ago

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    Two different types of hearing screening tests are used to screen hearing in babies. Both of these tests are safe and comfortable.

    Otoacoustic Emissions
    One of the tests is called otoacoustic emissions or OAEs. For this test, a miniature earphone and microphone are placed in the ear, sounds are played and a response is measured. If a baby hears normally, an echo is reflected back into the ear canal and is measured by the microphone. When a baby has a hearing loss, no echo can be measured on the OAE test.

    Auditory Brainstem Response
    The second test is called the auditory brainstem response or ABR. For this test, sounds are played to the baby's ears. Band-aid like electrodes are placed on the baby's head to detect responses. This test measures how the hearing nerve responds to sounds and can identify babies who have a hearing loss.


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