[Detection of hearing loss in patrons of a discoteque using TEOAE and DPOAE]

Author(s): Delb, W., Andes, C., Koch, A.

Journal/Book: Laryngorhinootologie. 1996; 75: 259-64.

Abstract: BACKGROUND. The aim of the study was to investigate the potential and difference of pure tone audiogram, TEOAE and DPOAE in the detection of temporary threshold shift. METHODS. 46 disco visitors who were exposed to disco music at an average intensity of 105 dB (A) for 1, 1 1/2 and 2 hours respectively underwent audiological examination before and after noise exposure. Audiological measurements performed were an audiogram and measurements of the TEOAE and DPOAE using the system ILO 92 (Otodynamics). RESULTS. The frequency range where the threshold shift occurred was around 4000 Hz in the 1 hour group and spread over all frequencies when the exposure time increased. The average threshold shift over all frequencies and probands was 6. 2 dB for the 1 hour group, 7.1 dB for the 1 1/2 hour group and 10.1 dB after 2 hours of noise exposure. TEOAE amplitudes showed significant reduction only at 2000 and 3000 Hz. Even at threshold shifts exceeding 15 dB, however not in all cases, a reduction of TEOAE amplitudes occurred. Similar results were obtained regarding the DPOAE measurements. CONCLUSIONS. We conclude that TEOAE and DPOAE are not ideal instruments in the detection of temporary threshold shift after noise exposure.

Note: Universitäts HNO-Klinik Homburg.

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