Active noise reduction method and system and automobile

Abstract

The invention discloses an active noise reduction method and system. The active noise reduction method comprises the steps of setting a plurality of microphones used for synchronously receiving sound signals and a loudspeaker used for generating reverse signals, wherein the plurality of microphones comprise a reference microphone, an optical microphone and an error microphone; respectively determining a sound signal transfer relation between the reference microphone and the optical microphone and a sound signal transfer relation between the error microphone and the optical microphone; acquiring reference noise signals and actual noise signals by using the sound signal transfer relations, and determining a noise filtering coefficient matrix of the reference microphone; controlling the loudspeaker to generate reverse signals which are identical in amplitude and opposite in direction to the reference noise signals according to the noise filtering coefficient matrix, and performing noise reduction on signals acquired by the error microphone. The invention further provides an automobile equipped with the active noise reduction system, influences imposed on user interaction by noise in the automobile can be eliminated, and the user interaction experience is improved.

Description

technical field [0001] The invention relates to the field of voice noise reduction, in particular to an active noise reduction method, system and automobile. Background technique [0002] Active noise reduction technology refers to the generation of a signal near the human ear that is equal in magnitude to the noise signal and opposite in direction, so that it and the noise signal cancel each other out to achieve the purpose of noise reduction. At present, this technology has been widely used in production and life, such as home theater, vehicles and so on. However, in the process of active noise reduction, while the noise is eliminated, some effective sounds are also removed. For example, in the vehicle scene, the use of active noise reduction technology for noise reduction in the car not only removes the noise of the engine, air conditioner, etc. The human voice in the car was also removed, resulting in distortion of the human voice in the car, affecting the communication...

AI Technical Summary

Problems solved by technology

[0005] On the one hand, the embodiments of the present invention provide an active noise reduction method and system to solve the problem that in the existing active noise reduction scheme, the reduction of effective human voice leads to the distortion of the human voice and affects the user's voice interaction experience.

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