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Impedance testing for hearing loss

This testing allows the audiologist to measure how well the eardrum is vibrating when the sound strike and how the tiny bones of the ear are working to transmit those vibrations to the organ of hearing.

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Impedance testing for hearing loss

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  1. IMPEDANCE TESTING Source:www.hearingsol.com

  2. IMPEDANCE TESTING This testing allows the audiologist to measure how well the eardrum is vibrating when the sound strike and how the tiny bones of the ear are working to transmit those vibrations to the organ of hearing. For tympanometry, a soft rubbery tip is inserted in the ear and the pressure in the ear canal is changed, resulting in a feeling like going up in an airplane. Finding abnormal things on this test may indicate a conductive loss requiring a referral for medical evaluation.

  3. IMPEDANCE TESTING METHOD Single stage screening method in both produces higher validity and sensitivity but lower specificity and predictive values of a positive test than two-stage screening. Screening rates were higher with impedance methods in comparison with pure tone audiometry. In choosing the appropriate method to be used for testing, it must be borne in mind that the impedance method is technically more efficient but takes longer than pure tone audiometry screening.

  4. AUDIOMETRY TEST

  5. IMPEDANCE TEST RESULT The pressure in the external auditory canal was varied from +200 to -300 data at the rate of 200 data per second. The parameters noted were compliance, ear canal volume (or base volume) and middle ear pressure. The acoustic reflex testing was also conducted. The change in compliance denoted the acoustic reflex in the monitored ear with the probe tip. Differences were also observed for middle ear pressure in two positions but could not reach the statistical significance level. Similar results were seen for compliance differences. The change of compliance during acoustic reflex is the most affected parameter by a shift of probe-tip position during impedance audiometry.

  6. THANK YOU For More Details Contact us on 1800-121-4408 (Toll Free) +91-9899437202 (Mobile) 011-47009114 (Landline) Visit Our Website: https://www.hearingsol.com/help/hearing-test/types/impedance-testing/

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