Created a Arduino device to stop people from making noise

The Need -

There is a need when folks around make a noise and i need to focus. Thought of creating a device where which will buzz when some one makes sound .

The High level Design

Will use three components. A sound detector device , Arduino and a buzzer.

CODE -

//This code is for Arduino Nano and detects Sound and buzzes alarm

const int soundPinDigital = 2;
const int buzzerPinDigital = 4;
int soundLevel;
bool soundDetected;
void setup() {
  Serial.begin(9600);
  pinMode(soundPinDigital, INPUT);
  pinMode(buzzerPinDigital,OUTPUT);
  Serial.println("Starting program");
  attachInterrupt(digitalPinToInterrupt(soundPinDigital), soundISR, FALLING);
}

void loop() {
  if (soundDetected){
    soundDetected=false;
    tone(buzzerPinDigital,3000);
    delay(200);
    noTone(buzzerPinDigital);

  }
}

Conclusion

This device was very useful for my use case and make other realize that they need to keep things low.