| 摘要 |
PURPOSE:To record by removing an unrequired voices of an operator, noises generated in a device, friction noises, striking noises and by removing a signal component of a second sound device from an output signal of a first sound device according to a necessity. CONSTITUTION:This device has the first sound device 1 inputting both of a necessary sound signal and an unnecessary sound signal and the second sound device 4 inputting an unnecessary sound signal. Amoung output signals of the first sound device 1, the unnecessary signal component only is outputted from the second sound device 4, and through a phase compensating circuit 9, and a gain adjusting circuit 10, a phase, by an amplitude, coincides with an unnecessary output signal component, by a subtracting circuit, the unnecessary signal component is removed and to record it by a recording device 13. |
