Noise reduction method, noise reduction system, noise reduction device and extractor hood

Abstract

The invention relates to a noise reduction method, a noise reduction system, a noise reduction device and an extractor hood. The method comprises the steps of: respectively generating a first noise reduction sound wave signal for counteracting a noise signal generated by the extractor hood and a second noise reduction sound wave signal for counteracting a noise signal in a preset space range awayfrom the position where a user is located; and playing the first noise reduction sound wave signal and the second noise reduction sound wave signal respectively. Therefore, noise reduction for extractor-hood noise and non-extractor-hood noise in a kitchen environment is realized, the noise in the kitchen environment where the user is located is effectively reduced, and the cooking experience effect of the user is improved. The noise reduction device can independently execute noise reduction processing work for noise signals generated by extractor-hood units and can also be matched with a noisereduction system special for noise signals generated by the extractor hood, and therefore, noise interference borne by the user during cooking in the kitchen environment is greatly reduced, and the experience effect of the user during cooking in the kitchen is improved.

Description

technical field [0001] The invention relates to the field of kitchen equipment, in particular to a noise reduction method, a noise reduction system, a noise reduction device and a range hood. Background technique [0002] Among the existing kitchen equipment, range hoods (or called range hoods) have become essential equipment for most home kitchens. Working through range hoods, the cooking fumes in the kitchen environment can be discharged in time to maintain the kitchen environment and even the entire indoor environment. clean air. The range hood usually produces noise when it is working, which affects the user experience. In order to reduce the adverse impact of the noise generated by the range hood on the user, currently an active noise reduction method (or active noise reduction method) is mainly used for noise reduction processing. [0003] The existing active noise reduction method is to add a noise collector, a sound signal generator and a loudspeaker device to coll...

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Problems solved by technology

[0005] However, the invention patent application CN107289482A discloses a self-learning automatic noise reduction method for range hoods. When the user enters the kitchen and starts the range hood and the range hood, the user's ears will not only receive the signal when the range hood is working in the kitchen environment. The noise generated (mainly motor noise), but also receive noises such as the movement of people in the kitchen environment, the kitchen door is opened, or the noise produced by various non-range hoods, these noises and the range hood The generated noise will bring bad experience to the user's sense of hearing and affect the user's cooking experience in the kitchen environment

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