| 摘要 |
PURPOSE:To improve the normal position of an image in a sound reproduced from the fixed position of installing a speaker by mixing a sound source input signals and a signal boosting a specified frequency from the input signal at random by a mixer circuit, and inputting the mixed signal to the speaker. CONSTITUTION:A signal correcting the phase of a signal extracted from an input signal source 1 through a phase correcting circuit 2 is inputted to one mixer circuit 7. On the other hand, a signal component at 7kHz as a center is separately extracted from the signal source 1 by a filter circuit 3, reinforced through a boost circuit 4 and inputted to an analog switch circuit 6 later. Next, the circuit 6 inputs a signal controlling the input signal to the other circuit 7 according to a signal from a random signal generator 5, and the circuit 7 mixes both signals from the circuit 2 and the circuit 6. Thus, the normal position of the image of the sound source can be increased for the reproduced sound of a speaker S according to a signal outputted from the circuit 7 regardless of where the speaker S is installed. |
