| 摘要 |
PURPOSE:To suppress a peak dip on sound pressure frequency characteristic by resonance by fitting a long side of a rectangular cone diaphragm only to a frame via an edge section and fitting a short side to the frame via a damping piece having a large internal loss. CONSTITUTION:The long side of the rectangular cone diaphragm 12 is supported by the frame 14 via the edge 13, the short side is bonded to the damping piece 20 and the damping piece 20 is fixed to the frame 14. A voice coil 15 vibrates the rectangular cone diaphragm 12. The effect of the edge 13 to the resonance is eliminated by passing the vibration through the damping piece 20, the resonance energy is absorbed and the peak dip is suppressed on the sound pressure frequency characteristic. |
