Browsing by Author "BAI, MINGSIAN R."

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EARPHONE ACOUSTIC SIMULATION SYSTEM AND OPTIMAL SIMULATION METHOD OF THE SAME
(2011-02-17)
BAI, MINGSIAN R.
;
KUO, YU-CHIH
An earphone acoustic simulation system and an optimal simulation method of the same is disclosed. The earphone acoustic simulation system comprises an earphone front end simulation circuit and an earphone back end simulation circuit for simulating acoustic environment of a front cavity and a back cavity inside an earphone, and an artificial ear simulation circuit is connected respectively with the earphone front end simulation circuit and the earphone back end simulation circuit. Variation of an impedance of the artificial ear simulation circuit represents the frequency response in the earphone cavity. Besides, the optimal simulation of the earphone acoustic simulation system utilizes simulated annealing algorithm to obtain the optimal parameter of the earphone cavity, and anticipates the SPL curve related to the optimal earphone cavity through utilizing the earphone acoustic simulation system.
INTELLIGENT CLASSIFICATION METHOD OF VOCAL SIGNAL
(2010-12-30)
BAI, MINGSIAN R.
;
CHEN, MENG-CHUN
An intelligent classification method is proposed. The method extracts vocal features from the temporal domain, spectral domain and statistical features for measuring the vocal signal. The measured result is grouped by comparing with the trained data with single voiced source, and then different voices can be separated from the vocal signal to be classified. The vocal features are evaluated from temporal domain and spectral domain and the statistical features, and the method can improve the accuracy of the voice classification.