How to detect the noise around you?

It can be detected by the function of smart phone, which is simple and convenient. The detection method is as follows:

1, click the application option of mobile phone system;

2. Then find the toolbox option;

3. Select OK in the pop-up prompt window;

4. Find the decibel meter tool;

At this time, you can detect the decibel of your room, and the noise level is the level of the decibel meter.