Please Be Quiet is project that monitors sound level throughout the night and if a sound is too loud it will blink an LED asking you to be quiet and will tell you in the morning how many times the sensor was activated.
We decided to make this project because as engineering students we study late into the night and sometimes our roommates are not on the same schedule as us. So instead of asking them every time they are loud, instead we can leave a device outside their room that flashes when they are too loud and in the morning they can see how many times the device flashed and when the last disruption was.
This device works by having a high sensitivity sound sensor connected to a particle argon. When the sound sensor detects a noise to loud, it sends a signal to the disruption panel telling the particle argon in the panel that there was a disruption at a certain time which is displayed on a LCD screen. In return, the disruption panel sends a signal pack to the sensor argon telling it to blink the LED light to notify that the previous noise was too loud. The data is also sent to ThingSpeak to show a visual graph of noise disturbances throughout the night. (https://thingspeak.com/channels/918447)
A video of our project in action can be found here: https://youtu.be/to2Jj9Y_Sbw