| 摘要 |
PURPOSE:To faithfully reproduce a sound approximately to the waveform of an output signal from a sound amplifier circuit by generating the same electric signal as a sound signal output waveform outputted from a speaker and positively or negatively feeding back the generated signal to the sound amplifier. CONSTITUTION:A sound signal amplified from an amplifier circuit 4 is inputted also to a speaker model circuit 5 in addition to its input to a speaker 8. The speaker model circuit 5 is constituted so as to output the same electric signal as a sound output from the speaker 8 and a part of an output signal from the circuit 5 is fed back to the input side of the amplifier 4 through a 2nd feedback circuit 7 to positively and negatively feed back the voice signal inputted to the amplifier circuit 4. Thereby, a distortion generated on the part of the speaker 8 can be removed and a sound can be faithfully reproduced in accordance with the output signal waveform of the sound amplifier. |
