Use of double-phase-sensitive detection to measure DPOAE signals

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Authors

  • Wojciech Michalski Wrocław University of Technology, Institute of Telecommunications, Teleinformatics and Acoustics, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
  • Wojciech Dziewiszek Medical University of Wrocław, Clinic and Department of Otolaryngology, T. Chałubińskiego 2, 50-368 Wrocław, Poland
  • Marek Bochnia Medical University of Wrocław, Clinic and Department of Otolaryngology, T. Chałubińskiego 2, 50-368 Wrocław, Poland

Abstract

This paper presents a new method of measuring distortion product otoacoustic emissions (DPOAE) induced by a two-tone acoustic wave. The method is based on double-phasesensitive detection whereby it is possible to precisely measure DPOAE signals whose acoustic pressure level is even below −15 dB. Exemplary experimental results for guinea pigs are given.

Keywords:

phase-sensitive detection, DPOAE.