The impact of noise pollution on peoples working lives has caused people to pay attention to this issue, creating a good and comfortable working and living environment, and making noise in real time intuitive and quantifiable. This type of noise tester can be used. Noise testing and recording in public places such as study, accommodation, work, and squares. This application is continuously optimized and upgraded by the continual meeting. In addition, this application is not yet accurate enough for scientific experiments, and the scope of noise quantification is still relatively small. Please cool down!