ASA 126th Meeting Denver 1993 October 4-8

5aSP13. The preliminary application of Gabor spectrogram analysis in speech samples.

Jack J. Jiang

Dept. of Otolaryngology---Head and Neck Surgery, Northwestern Univ., 303 E. Chicago Ave., Chicago, IL 60611

Shie Qian

Natl. Instruments, TX 78730

David G. Hanson Eric Cuasay Jerilyn Logemann

Northwestern Univ., Chicago, IL 60611

It has been widely recognized that the FFT-based spectrogram does not provide good simultaneous resolution in both time and frequency domains. A new method of spectral analysis has been developed based upon the Gabor expansion and the Wigner--Ville distribution. The resolution of the Gabor spectrogram is twice as high as that of a FFT-based spectrogram. In this report, FFT-based spectrograms and Gabor spectrograms are compared for 5 English vowels, 6 stops consonants, 4 fricatives, and vowels format transitions in a CVD contents on 6 normal subjects. Results demonstrate that the Gabor spectrogram is a promising alternative for FFT-based spectrogram in speech analysis because of its higher temporal and frequency resolution.