| 摘要 |
PROBLEM TO BE SOLVED: To improve detection characteristics of vibration without making worse the vibration characteristics of a bridge that a string touches by pressing a piezoelectric transducing means against two leg parts of the bridge and outputting only the electric signal based upon pressure applied from one leg part. SOLUTION: Both the right and left sides of the piezoelectric transduckg unit 10 are clamped between the leg parts 8 and 9 of the bridge and a pedestal and pressed by the both. On the top surface of the piezoelectric element 14, right-side conductive layers 13b and 14b pressed by the leg part 8 and left-side conductive layers 13c and 14c pressed by the leg part 9 are shielded by section parts 13d and 14d. In this constitution, a core wire 21 is inserted into the through hole 13a of a piezoelectric element substrate 13 from below, and consequently the core wire 21 electrically connects with the right-side conductive layers 13b and 14b through the conductive layer on the inner peripheral surface of the through hole 13a. Therefore, only vibration applied to the piezoelectric element 14 by one of the two leg parts 8 and 9 can be detected. |
