Electronic drum having a closed air space

Details Electronic drum having a closed air space Electronic drum having a closed air space

1985-07-02

1987-06-02

Witkowski, S. J.

Music

Instruments

84DIG12, 84DIG24, G01H 314

Patent

active

046693491

ABSTRACT:
An electronic drum has a drum body, a drumhead, a support/tension mechanism, a closed space forming member, a vibrating plate, and a piezoelectric element. The closed space forming member forms a closed air space together with the drumhead lower surface. The vibrating plate is fitted to the closed space forming member so as to divide the closed air space into plural closed air spaces. One of the divided plural closed air spaces existing between the lower surface of the drumhead and the vibrating plate serves as a transmission space. When the drumhead is struck, the vibration of the struck drumhead is transmitted to the vibrating plate via the transmission space. By this transmission via air space, same vibration at the vibrating plate is obtained irrespective of the struck portion of the drumhead if struck by same striking force. The piezoelectric element converts a pressure produced based on a mechanical vibration of the vibrating plate to an electrical signal.

REFERENCES:
patent: 4226156 (1980-10-01), Hyakutake
patent: 4479412 (1984-10-01), Klynas

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