Spy microphone that detects noise

In this section, we will look at a project that we can use in a house to detect noise or the level of sound so that we can detect when a person talks in front of the house. This project consists of a module that has a microphone, similar to the following image:

Software code

We need to make a program that can read the analog signal that the module sends to the Arduino board:

const int ledPin =  12;         // the number of the LED pin 
const int thresholdvalue = 400; //The threshold to turn the led on 
 
void setup() { 
 pinMode(ledPin, OUTPUT); 
 Serial.begin(9600); 
} 
   
void loop() { 
  int sensorValue = analogRead(A0);   //use A0 to read the electrical signal 
  Serial.print("Noise detected="); 
  Serial.println(sensorValue); 
  delay(100); 
  if(sensorValue > thresholdvalue) 
  digitalWrite(ledPin,HIGH);//if the value read from A0 is larger than 400,then light the LED 
  delay...