| 摘要 |
A noise reduction system is comprised of a rotational speed data detecting unit, a parameter detecting unit that detects a characteristic parameter representing a characteristic of a noise that is superimposed on an input signal inputted into an electronic device, a correlation forming unit that forms correlation data of the characteristic parameter and the engine rotational data, and canceling signal forming unit that forms a canceling signal and an adder that adds the canceling signal to the input signal.
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