| 摘要 |
A bone conduction microphone is provided to output an electrical signal without an external noise by using a copper plate and a pair of piezoelectric devices. A case(10) blocks an external noise or an unnecessary noise. A vibration contact part(30) delivers a minute vibration when being contacted with a bone of a human body. An electrical signal generating part(20) converts vibration delivered inside the case into an electrical signal. A copper plate generates vibration by the minute vibration. A pair of piezoelectric devices(22) converts vibration of the copper plate into an electrical signal. A weight controls and maintains vibration balance in a pair of piezoelectric devices. A conductive line outputs the electrical signal generated in the piezoelectric device to outside. |
