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Acoustical study on sub-harmonic of glottal source in Mandarin tones

This paper is concerned with the acoustical analysis of the sub-harmonic of the glottal source in Mandarin tones. The methods used in this research are: (1) extracting the glottal source of tones by inverse filtering; (2) analyzing sub-harmonic and spectrum tilt by FFT; (3) simulating the double peak pulse by 4 functions and describing the nature of them in both time and frequency domains. There are 3 conclusions: (1) the double peak pulse produces a sub-harmonic in the glottal source of Mandarin tones; (2) the sub-harmonic influences the spectrum tilt; (3) the double peak pulse can be simulated and modeled mathematically.