Scene-adaptive active noise reduction method and system

The invention belongs to the technical field of active noise reduction, and particularly relates to a scene-adaptive active noise reduction method and system. The method comprises the following steps: acquiring a reference microphone signal and a multi-modal sensor signal, and inputting the signals into a scene classification model; if the output result of the scene classification model is abnormal sound, alarm information is triggered and generated; or, if the output result of the scene classification model is the preset scene type and the influence factor of the scene, an ANC parameter table is searched according to the preset scene type and the influence factor of the scene, and the ANC parameters are determined to be used for the ANC control module to operate; or, if the matching degree between the output result of the scene classification model and the abnormal sound and the matching degree between the output result of the scene classification model and the preset scene are both lower than the threshold