Adaptive wiener filtering for improved acquisition of distortion product otoacoustic emissions

Özcan Özdamar, Rafael E. Delgado, Syed Rahman, Carlos Lopez

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

An innovative acoustic noise canceling method using adaptive Wiener filtering (AWF) was developed for improved acquisition of distortion product otoacoustic emissions (DPOAEs). The system used one microphone placed in the test ear for the primary signal. Noise reference signals were obtained from three different sources: (a) pre-stimulus response from the test ear microphone, (b) post-stimulus response from a microphone placed near the head of the subject and (c) post-stimulus response obtained from a microphone placed in the subject's nontest ear. In order to improve spectral estimation, block averaging of a different number of single sweep responses was used. DPOAE data were obtained from 11 ears of healthy newborns in a well-baby nursery of a hospital under typical noise conditions. Simultaneously obtained recordings from all three microphones were digitized, stored and processed off-line to evaluate the effects of AWF with respect to DPOAE detection and signal-to-noise ratio (SNR) improvement. Results show that compared to standard DPOAE processing, AWF improved signal detection and improved SNR.

Original languageEnglish (US)
Pages (from-to)883-891
Number of pages9
JournalAnnals of biomedical engineering
Volume26
Issue number5
DOIs
StatePublished - Jan 1 1998

Keywords

  • Adaptive noise canceling
  • Hearing testing

ASJC Scopus subject areas

  • Biomedical Engineering

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