| 摘要 |
PURPOSE:To transmit a transmission voice when talking is implemented while a reception section is in contact with an ear even if the main body is sufficiently miniaturized by mounting a bone conduction microphone picking up a bone conduction voice signal to a telephone set main body with a prescribed distance parted from a speaker. CONSTITUTION:A bone conduction microphone 10 picking up a bone conduction voice signal is adopted for a microphone and the bone conduction microphone 10 is mounted to a telephone set main body 2 with a prescribed interval from a speaker. Then the bone conduction microphone 10 is placed to a position close to an ear of a face at which voice vibration is well delivered such as a cheekbone, then the transmission voice of a talker is picked up by the bone conduction microphone 10 from the cheekbone. Since the bone conduction microphone 10 is used for the transmission of a portable telephone set 2, it is not required to provide the microphone at a prescribed human engineering position and the miniaturization of the portable telephone set is attained. |
