ACTIVE CONTROLLING APPARATUS OF COOLING FAN NOISE FOR A CAR

摘要

An active control apparatus of rotating noise in car cooling fan having: a cooling fan rotation sensor sensing the rotation of a cooling fan; a control means outputting signals to a control speaker when the output of the cooling fan rotation sensor is applied; a control speaker outputting acoustic waves when the signals of the control means are applied; and a microphone making the feedback error noise generated by the combination of the control voice of the control means and the rotation noise of the cooling fan; is disclosed. Thereby, it is possible to prevent the rotation noise of the cooling fan by generating the periodic control voice according to the rotation speed of the cooling fan.