Noise reduction method, smart home device and system

The invention relates to the field of smart home, in particular to a noise reduction method and smart home equipment and system.The noise reduction method comprises the steps that a self-adaptive load module and a control module are configured in the equipment, the self-adaptive load module has an adjustable resistance value, and the control module communicates with the outside and regulates and controls the resistance value of the self-adaptive load module; a first noise pickup sensor, a first adaptive module, a second noise pickup sensor and a second adaptive module are arranged in the noise detection front end; the noise detection front end detects the noise of the equipment, when the noise of the equipment is abnormal, the noise detection front end sends an abnormal signal to the control module, the control module controls the self-adaptive load module to lower the resistance value, and the noise of the equipment is detected by matching the maximum impedance value of the self-adaptive load. The frequency