| 摘要 |
PROBLEM TO BE SOLVED: To provide a microphone for learning which hardly catch noise even in an environment with much noise by providing directivity in the direction of a speaker and has a function for correcting pronunciation of the speaker by catching expiratory flow of the speaker. SOLUTION: A plurality of voice microphones P1 and P2 for converting voice into a voice signal and an expiratory flow sensor for converting the wave motion of expiratory flow into an expiratory flow signal are included. The voice microphone P1 is arranged at the position of a center line 6 on a voice collection surface of the microphone 1 for learning, and the voice microphones P2 are arranged on almost circular outer frame with the center line 6 being as a center. The expiratory flow sensor is composed of a dynamic speaker P3 whose resonance frequency is about 300 Hz and is arranged inside the almost circular outer frame 2. A DSP (digital signal processor) incorporated part 8 that incorporates a DSP for converting these electric signals into digital signals and extracting a voice characteristic signal representing a voice characteristic, and an input-output interface 9 for outputting the digital signals and the voice characteristic signal are included. COPYRIGHT: (C)2007,JPO&INPIT
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