Otoacoustic emission acquisition using Adaptive Noise Cancellation techniques

Ozcan Ozdamar, Rafael E. Delgado

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A Distortion Product Otoacoustic Emission (DPOAE) system utilizing multiple microphones and advanced noise cancellation methods is described. This application focuses on noise cancellation techniques used to reduce internal and external noise contamination especially at the frequencies under 1500 Hz. Two additional microphones were used to acquire external and internal noise reference signals from the non-test ear and from the testing environment. Hardware and software was developed and experiments conducted to test the feasibility of using two noise reduction techniques, Adaptive Noise Cancellation (ANC) and Adaptive Wiener Filtering (AWF). Data were acquired in single sweeps and processed off-line with each method. Additional real-time ANC experiments were also conducted. Experimental results demonstrated that the ANC algorithm has the ability to reduce background noise and improve the SNR levels of DPOAE signals by about 5 dB. The AWF algorithm was also found to improve SNR levels between 3 and 9 dB at the lower frequencies depending on the reference microphone combination.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Biomedical Engineering Days
EditorsY. Ulgen
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages139-143
Number of pages5
StatePublished - Jan 1 1998
EventProceedings of the 1998 2nd International Conference on Biomedical Engineering Days - Istanbul, Turkey
Duration: May 20 1998May 22 1998

Other

OtherProceedings of the 1998 2nd International Conference on Biomedical Engineering Days
CityIstanbul, Turkey
Period5/20/985/22/98

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Ozdamar, O., & Delgado, R. E. (1998). Otoacoustic emission acquisition using Adaptive Noise Cancellation techniques. In Y. Ulgen (Ed.), Proceedings of the International Conference on Biomedical Engineering Days (pp. 139-143). IEEE.