Research On Visualization And Modeling Of Noise Control System For Home Environment

With the continuous improvement of the quality of life and continuous innovation of various intelligent products and technologies,the comfort of home environment becomes the basic needs of lives.Noise is an inevitable sound pollution in modern human life.Long-term exposure to noise can affect people's health adversely.Therefore,researchers have pay attention to the indoor noise analysis and control.At the same time,the study of home sound comfort as an important part of digital home technology makes the traditional home life toward to the smart home.Then,in order to control the noise effectively,it is necessary to express more complex data to create a high-quality and beautiful sound effect experience for the home environment.Therefore,indoor sound field visualization is also an important research to improve the user's perception of sound distribution throughout the interior space.The main work of the paper is as follows:(1)This paper studies the algorithm principle of active noise reduction technology for the noise inhibition and the framework structure of active noise control system based on Fx LMS algorithm is used for modeling.The feasibility of the multi-channel suppression system is achieved through a two-channel loudspeaker model,which lays the foundation for the research of visual distribution of the sound field under the noise inhibition system.(2)Since the research is oriented toward the home environment,the indoor sound field has a complex spatial structure and internal environment due to the influence factors.Therefore,a space model is established according to the indoor environment parameters and the image source method is used to c simulate the propagation process of sound waves in the room.The influence factors of the sound source points to the receiving points are calculated to obtain the sound wave information of the receiving points in the space.In order to study the comfort of indoor sound better,this paper proposes a method that combine the Fx LMS algorithm with the image sound method to model the secondary path.Acoustic simulation results under indoor noise suppression system are obtained by setting different environmental parameters,and the best location for noise control system deployment is calculated.(3)In order to demonstrate the noise reduction effect of the simulation system in the home environment,this paper adopts the discrete sampling method to achieve the three-dimensional visualization of the sound field under the entire home noise inhibition system.The research aims to realize the active noise control of a local area in the home environment.The density of the indoor quite point represents the comfort of the local area.In order to obtain the quite region after the noise inhibition,the Delaunay triangulation algorithm is used to integrated the region and the visual representation of the local quite region is obtained.Computer simulation technology is used to simulate and visualize the sound field in the home environment.It provides the algorithm support and effect verification tools for active noise reduction system design.It can improve the engineering efficiency of active noise reduction design effectively and reduce unnecessary sound field testing,time and cost.