An active noise reduction system and method

Abstract

An active noise reduction system comprises a plurality of groups of noise collection modules, loudspeaker modules and distance measurement modules, each group of noise collection modules, loudspeakermodules and distance measurement modules are arranged in one of a plurality of areas pre-defined by a to-be-measured site, and the group of noise collection modules are used for collecting environmental noise and forming noise signals; the group of loudspeaker modules are used for generating and playing noise opposite to the noise signals collected by the group of noise collection modules; the distance measuring modules are used for collecting real-time images of people in the to-be-measured field, identifying the positions of the people and calculating the real-time distance between the loudspeaker module and the people; an analysis module which is used for analyzing the noise of each group of noise collection modules and the distance information of the distance measurement modules; and acontrol module which is used for controlling the loudspeaker module to send anti-phase noise according to the information input by the analysis module.

Description

technical field [0001] The invention relates to the field of living environment, in particular to an active noise reduction system. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for the living environment, not only requiring the living space to be neat and clean, but also requiring the living environment to be free from noise pollution. According to the allowable indoor noise standards for residential buildings formulated by the Ministry of Construction, the noise limit for bedrooms and study rooms is a maximum of 45 decibels during the day and a maximum of 35 decibels at night. However, the environmental protection department does not use this as a basis for law enforcement. The reason is that the standard was not formulated by the environmental protection department. Indoor noise cannot be divided into five categories like outdoor noise, but can only be classified into one or two categories, because com...

AI Technical Summary

Problems solved by technology

[0006] However, there is not yet a particularly good method for noise reduction in an environment such as a bedroom with large spaces, multiple stimuli, and complex listeners.

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