Archives of Acoustics, 32, 4(S), pp. 129-134, 2007

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

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

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.
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