| 摘要 |
FIELD: electricity. ^ SUBSTANCE: in loud-speaker system, drive and method of loud-speaker driving loud-speaker element is used which is connected by metal piece with memory device; it is made as portable electronic device and there is power supply unit that supplies power to metal piece with memory device. Metal piece with memory device can apply force to loud-speaker element when power is supplied to metal piece with memory device. ^ EFFECT: cheapening, simplification and decrease in loud-speaker weight and dimensions. ^ 12 cl, 6 dwg |
