gms | German Medical Science

78. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

16.05. - 20.05.2007, München

Amplitude shift of distortion-product otoacoustic emission (DPOAE) following sound and noise exposures

Meeting Abstract

  • corresponding author J. G. Kiss - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary
  • F. Tˇth - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary
  • L. A. Nagy - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary
  • L. Rovˇ - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary
  • Sz Beke - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary
  • N. Pataky - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary
  • J. Jˇri - University of Szeged, Department Of Otolaryngology, Head and Neck Surgery, Szeged, Hungary

German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. 78th Annual Meeting of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. Munich, 16.-20.05.2007. DŘsseldorf, K÷ln: German Medical Science; 2007. Doc07hno005

Die elektronische Version dieses Artikels ist vollstńndig und ist verfŘgbar unter: http://www.egms.de/de/meetings/hno2007/07hno005.shtml

Veröffentlicht: 8. August 2007

© 2007 Kiss et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Introduction: In the last years the application of distortion-product otoacoustic emission (DPOAE) became a very important differential diagnostic method in series of audiological measurements. DPOAE gained popularity as an indicator of changes in thresholds and the activity of outer hair cells. Our previous results showed that the amplitudes of DPOAEs increased at high frequency range (2-6 kHz) right after noise exposure (intensity: 80 dB HL, duration: 3 minutes).

Methods: Our aim was to determine the shortest time interval of exposure which causes significant amplitude shift, and to show the intensity changes in time following sound and noise exposures. We performed examinations on 20 healthy hearing persons. DPOAEs were recorded by scanning the 2-6 kHz frequency interval (3 points per octave) before and after the exposures. The subjects were exposed to 1 kHz sound and wide-band noise (intensity: 80 dB HL) with different durations (0.5, 1, 1.5, 2, 2.5, 3 minutes).

Results and conclusions: Our results show that significant amplitude increase was caused by 2 minutes exposure in every measured frequency. After 2 minutes the values returned exactly to the amplitude levels which were measured before the exposure. We can conclude that after noise exposure there is a quick phase when the activity of hair cells increases.