Abstract
Introduction. The analysis of the properties of otoacoustic emissions (OAEs) in patients with Meniere's disease was undertaken. Methods. Within a comprehensive project, click-evoked as well as three-distortion-product OAEs were measured in 100 patients with Meniere's disease. The measurements were performed using the standard ILO equipment. Results. The OAE incidence in affected ears (56%) was lower than in unaffected ears (85%). The mean emission amplitude was also significantly lower (2.6 dB). No differences between uni- and bilaterally affected ears were present. Ears with OAEs clearly showed smaller hearing losses than ears without OAEs (24 dB difference). The average hearing loss showed correlations with the emission amplitudes, although not very strongly; when plotted against the smallest hearing loss, a clearer upper limit for the emission amplitude was present. The amplitude of click-evoked OAEs showed a considerable correlation with the largest of the three-distortion-product OAEs. Conclusion. Otoacoustic emissions in patients with Meniere's disease show no deviant properties compared with other hearing impaired patients: an audiogram with partly normal thresholds possibly yields OAEs.
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