1、该作品用于监视外界的噪声，通过外部的声音传感器不断的监测外界的声音信号；
2、当外界噪声强度超过一定的强度并且该噪声持续一定的时间时，单片机就会输出一个触发信号给声音播录模块；
3、然后声音播录模块就会被触发而发出警报，从而达到报警提醒的目的。(1, the work used to monitor the noise of the outside, through external sound sensors to monitor the external voice signals;
2, when the external noise intensity exceeds a certain intensity, and the noise lasts for a certain time, the microcontroller will output a trigger signal to the sound broadcast module;
3, and then the sound broadcast module will be triggered and alarm, so as to achieve the purpose of alarm reminder.)