Abstract :
Internet of things is a concept or program where an object has the ability to transmit or transmit data over a network without using the help of computers and humans. In the design of noise level detection in this polbeng library as a
whole it consists of an Arduino Uno Microcontroller, an LED circuit, a Sound Sensor circuit, a buzzer circuit, and a series of running text panels that are connected as a whole. Based on the sound sensor test table above, it can be concluded that the sound sensor works well even though the ADC value is different from the sound level meter / decibel value. And the sound sensor cannot work properly if the detected sound distance is too far from the sound sensor.