Reduction of Cross Terms in Wigner-Ville Distribution of Transiently Evoked Otoacoustic Emission

• Autorzy: Grzanka A. , Hatzopoulos S. , Śliwa L. , Muliński W.
• Języki publikacji: EN

Abstrakty

EN

The objective of the paper is to present a new method of time-frequency representation, applicable on signals of short duration, based on regional smoothing of Wigner-Ville distribution (WYD). The proposed algorithm reduces the amplitude of the cross-terms and preserves high resolution of the WYD, because the smoothing routine is applied only in the regions where cross-terms appear. The criterion for cross-terms localisation is the negativity of energy in the time-frequency plane. The method is energy balanced and does not affect the positive values of the spectrogram. The method has been specially fitted for Transiently Evoked Otoacoustic Emission (TEOAE) signals, whose spectral properties are still under investigation. The presented results show (i) that the TEOAE signals are very complex and (ii) that the application of the proposed method of analysis may decompose the TEOAE signals into components which may contribute more to our understanding of the TEOAE underlying cochlear mechanies.

Słowa kluczowe

EN

spectogram; joint time-frequency analysis; Wigner-Ville distribution; cross-terms; Transiently Evoked Otoacoustic Emission; signal decomposition

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2001
• Tom: vol. 49, nr 3
• Strony: 493--503
• Opis fizyczny: 2 rys., bibliogr. 14 poz.

Twórcy

autor

Grzanka A.

autor

Hatzopoulos S.

autor

Śliwa L.

autor

Muliński W.

• Warsaw University of Technology, Institute of Electronic Systems, ul. Nowowiejska 15/19, 00-665 Warsaw, Poland (Politechnika Warszawska, Instytut Systemów Elektronicznych),