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A bone-conductive microphone which transforms bone-transmitted speech sounds through skull into electronic signals has two advantages. One is to operate in hands free mode, and another is to be anti-noise. Therefore, it is expected to match the man-machine interface for wearable computers.Here, we examined and analyzed the possibility of a speaker identification system with the MFCC of air and bone-transmitted speech sounds to 5 Japanese vowels. This paper shows that the system using spectral ratio between air-transmitted speech sounds and bone-transmitted speech sounds gives better performance than the system using air-transmitted speech sounds.

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In this paper, we propose a method to synthesize whistling sounds using frequency modulation, for musical whistling certificate examination system. This paper shows that the proposed whistling sounds have good sound quality in comparison with MIDI sounds.

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