| 摘要 |
PROBLEM TO BE SOLVED: To provide an MFB speaker device in which MFB feedback control can be freely and continuously adjusted either in a positive or in a negative feedback manner. SOLUTION: The MFB speaker device is equipped with an amplifier 1 amplifying an audio signal input, a speaker unit 2 converting the output of the amplifier 1 into sounds, a detector 3 which is attached to the speaker unit 2 to detect and convert the movement of the vibration system of the speaker unit 2 to a voltage, and a feedback control circuit 4 which controls the output voltage of the detector 3 to set a feedback volume (negative or positive feedback volume) continuously variable and to output it to the amplifier 1. COPYRIGHT: (C)2004,JPO&NCIPI |
