| 摘要 |
<P>PROBLEM TO BE SOLVED: To quickly perform a MFB setting. <P>SOLUTION: A digital signal processing unit 2 is supplied with a digital audio signal. The digital audio signal is subjected to a low-frequency compensation process by a low-frequency correction equalizer 5 and supplied to a combining unit 6. A detection signal obtained by detecting a movement of a speaker unit 15 is converted into a digital detection signal by an ADC 17. The digital detection signal is supplied to the digital signal processing unit 2. The digital detection signal is multiplied by a gain coefficient to generate a feedback signal in a gain adjustment unit 7. The feedback signal is combined with the digital audio signal by a combining unit 6. The plural gain coefficients are stored in a storage unit 4. A control unit 3 controls so that the gain coefficient selected by the control unit 3 from the plural gain coefficients is used for the multiplication by the gain adjustment unit 7. <P>COPYRIGHT: (C)2012,JPO&INPIT |
