| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise with sufficiently high accuracy by a noise gate.SOLUTION: A signal processor 10 includes a DSP 12 generating a digital signal Dm by performing digital processing on a digital input signal Din, a DAC 13 generating an analog signal Am by DA-converting the digital signal Dm, and a variable gain amplifier 14 generating an analog output signal Aout by adjusting the amplitude of the analog signal Am. The DSP 12 generates a control signal Cs for specifying a specific period T in which the amplitude of the analog output signal Aout is reduced. The variable gain amplifier 14 reduces the amplitude of the analog output signal Aout for the specific period T specified by the control signal Cs. |
