| 摘要 |
PROBLEM TO BE SOLVED: To obtain voice information having high reproducibility similar to air-transmitted sound from acquired bone conduction sound. SOLUTION: This microphone device is composed of a detection part 1, a signal processing part 22, and an output part 23. The detection part 1 has a plate shape, and detects vibration on the body surface in close contact with one side of the plate shape to convert it to an electric signal. The signal processing part 22 applies, to an electric signal output from the detection part 1, a filter using an inverse transfer function to the transfer function of the body from a vocal organ of the body to a position where the detection part 1 of the body surface is mounted. The output part 23 outputs the electric signal filtered by the signal processing part to the outside. COPYRIGHT: (C)2009,JPO&INPIT
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