HHT-based time-frequency analysis in voice rehabilitation

Authors:
Chin-Feng Lin;Hsiu-Feng Chuang;Yung-Hsin Wang;Cheng-Hui Jian
Affiliations:
Department of Electrical Engineering, National Taiwan Ocean University, Taiwan, Republic of China;Department of Otolaryngology Division, Keelung Chang Cung Memorial Hospital, Taiwan, Republic of China;Department of Electrical Engineering, National Taiwan Ocean University, Taiwan, Republic of China;Department of Electrical Engineering, National Taiwan Ocean University, Taiwan, Republic of China
Venue:
AIC'10/BEBI'10 Proceedings of the 10th WSEAS international conference on applied informatics and communications, and 3rd WSEAS international conference on Biomedical electronics and biomedical informatics
Year:
2010

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Abstract

This paper discusses the time-frequency characteristics of recorded human voice changes before and after rehabilitation by using Hilbert-Huang Transformation (HHT) analysis. In addition, the objective is to determine how the HHT time-frequency distributions of recorded human voice changes before and after rehabilitation and then to identify the physical basis for each type of change seen in the HHT-based concepts. The basic goal is to devise a distribution that represents the intrinsic mode functions of a voice rehabilitation signal simultaneously in time and frequency. We explain the differences in the intrinsic mode functions (IMFs) and instantaneous frequencies (IFs) before and after voice rehabilitation.