normal impedance

normal impedance

[′nȯr·məl im′pēd·əns]
(electronics)
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INCLUSION CRITERIA: A normal otoscopy, Pure tone audiometry thresholds equal to or below 20 dB at 250 Hz, 500 Hz, 1000Hz, 2000Hz, 4000Hz and 8000Hz; Normal Impedance test (A type curve) with the presence of the ipsilateral and contralateral stapedial reflex.

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