| 摘要 |
PROBLEM TO BE SOLVED: To radiate a sound corresponding to the vibration of a drum head by efficiently detecting the vibration of the drum head.SOLUTION: A drum 11 includes: a first sensor 161; a second sensor 162; and a third sensor 163. The first sensor 161 outputs a first signal indicating the vibration of a first drum head 110, and the third sensor 163 outputs a third signal indicating the vibration of a second drum head 120. The second sensor 162 outputs a second signal indicating a sound in the drum 11. A signal processor 20 performs signal processing to the first signal, the second signal and the third signal, and amplifies the signals subjected to the signal processing by an amplification part 220, and adds those signals by an adder 230. The signals added by the adder 230 are output to a speaker.SELECTED DRAWING: Figure 1 |
