| 摘要 |
<p>PROBLEM TO BE SOLVED: To generate a natural and rich sound.SOLUTION: A sound board 7 is formed with a lumber and a wood material, and is a plate-like member substantially composed of a plate-like part as a whole. A frame 70 is laminated and arranged on the sound board 7. Many portions of the area except for a frame part and a ribs 71 of the frame 70 are horizontal plate-like parts. When the frame 70 is laminated on the sound board 7, respective plate-like parts of the front part 70f and the rear part 70r face the sound board 7. The sound board 7 is arranged with a voice coil type vibration application device, and the frame 70 is arranged with a voice coil reaction type vibration application device 80 for vibrating an object using its own inertia. The vibration application device 80 is arranged at a position which is not interfered with the structure such as ribs 71 and the like, holes or other component parts. When the vibration application apparatus 80 is input with a drive signal from a control device, the sound board 7 and the frame 70 are applied with vibrations.</p> |
