ABSTRACT
With the acceleration of worldwide urbanization course, the rapid expansion of city scales and the continuous development of city construction, problems of urban environmental noise are becoming more and more serious. They have brought increasingly severe influence on people's working and living. And these problems have gradually become hot spots that arouse extensive attention like water pollution and air pollution. Although China has developed a number of laws relating to environmental noise control, which provide a legal basis for the management of environmental noise pollution, due to expensive market price of noise measuring instrument that the residents who living in the noisy environment can not be good to safeguard their interests.
This issue introduced the following Content. First, how to use a sound sensor to change the sound signal into voltage signal and an ADC0809 Chip to Analog-to-digital conversion. Second, using the single-chip microcomputer to deal with and display the data. This is a simple and cheap noise measuring instrument which is suitable for daily life and can be better used to help people improve the quality of life.
Keywords: noise,urban environmental noise,sound level meter