| 摘要 |
PCT No. PCT/JP89/00958 Sec. 371 Date May 15, 1990 Sec. 102(e) Date May 15, 1990 PCT Filed Sep. 21, 1989 PCT Pub. No. WO90/03136 PCT Pub. Date Apr. 5, 1990.The present invention provides a headrest (1C, 2C) in which a bone-conduction microphone (1B, 2B) is mounted in such a position as to be in contact with the back side of the head of the operator. The invention also provides a mobile body comprising the headrest (1C, 2C) as a constituent member and characterized in that the output of the bone-conduction microphone is used for a telephone voice or for speech recognition control of a device such as one installed on a vehicle. The invention further provides a mobile body comprising the headrest as a constituent member and characterized in that sleep of the operator is detected by the output of the bone-conduction microphone (1B, 2B).
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