| 摘要 |
PROBLEM TO BE SOLVED: To more accurately detect vibration of a bridge or the like caused by playing operations of a rubbed string instrument. SOLUTION: Lateral vibration detecting piezoelectric sensors 51a and 51b, an insulation layer 52 and longitudinal vibration detecting piezoelectric sensors 53a and 53b are arranged and laminated between the bottom surfaces of leg sections 18a and 18b of a bridge 7 and a body 2A. The sensor 51a and 51b and the sensors 53a and 53b are arranged along a polarizing direction as shown in Figure. Thus, detected signals being outputted from an output line 55 mainly include lateral vibration components of the vibration generated in the bridge 7 and detected signals being outputted from an output line 57 mainly include longitudinal vibration components of the vibration generated in the bridge 7. Lateral and longitudinal vibration components are independently detected by a vibration detecting unit 50 which has the constitution described above. |
