Affiliations: [a] Centro di Ingegneria Biomedica CNR, Piazza Leonardo da Vinci 32, I-20133, Milan, Italy | [b] Dipartimento di Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133, Milan, Italy
Correspondence:
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Correspondence to: Dr. Gabriella Tognola, Centro di Ingegneria Biomedica CNR, Dipartimento di Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milan, Italy. Tel. and fax: +39-2-2399-3344; E-mail: tognola@biomed.polimi.it.
Abstract: Click-evoked otoacoustic emissions (CEOAEs) are time-varying signals with a clear frequency dispersion along with the time axis. Analysis of CEOAEs is of considerable interest due to their close relation with cochlear mechanisms. The particular structure of CEOAEs requires a time-frequency method with both a satisfactory time and frequency resolution. In this paper, several basic time-frequency distribution methods are considered and compared on the basis of both simulated signals and real CEOAEs. Results from simulations and real CEOAEs revealed that the wavelet approach is highly suitable for the analysis of such signals. Some examples of the application of the Wavelet Transform to CEOAEs are provided here. Applications range from the extraction of normative data from adult OAEs to the extraction of quantitative parameters for clinical purposes.
