Distortion Product Otoacoustic EmissionsThe Influence of the Middle Ear Transmission
- 1 January 1993
- journal article
- research article
- Published by Taylor & Francis in Scandinavian Audiology
- Vol. 22 (2) , 111-116
- https://doi.org/10.3109/01050399309046026
Abstract
Distortion product otoacoustic emissions (DPOEs) were recorded in 8 normal hearing subjects (16 ears, mean age 37) in order to evaluate the sensitivity of the DPOE amplitudes as a function of pneumatic changes (–400 to +200 daPa) in the external ear canal. The responses were collected using time averaging and subsequent FFT-analysis of the collected data. Distortion products were measured at the following geometric mean frequencies: 1000, 2000, 4000, 6000 and 8000 Hz. The results show that the amplitudes of the distortion products depend on an optimal transmission through the middle ear, and that measurements of DPOEs should always be preceded by determination of the midde ear pressure. The present findings are in good agreement with investigations based on evoked otoacoustic emissions published by other researchers.Keywords
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