Arduino ses sensörü sesi algılamıyor

#include <LiquidCrystal.h>
LiquidCrystal lcd(7,8,10,11,12,13);

int num_Measure = 128 ; // Set the number of measurements   
int pinSignal = A0; // pin connected to pin O module sound sensor 
int redLed = 5;
long Sound_signal;    // Store the value read Sound Sensor   
long sum = 0 ; // Store the total value of n measurements   
long level = 0 ; // Store the average value   
int soundlow = 40;
int soundmedium = 500;
 
void setup () 
{   
  pinMode (pinSignal, INPUT); // Set the signal pin as input   
  Serial.begin (9600);
  lcd.begin(16,2);
} 
  
void loop () 
{ 
  // Performs 128 signal readings   
  for ( int i = 0 ; i <num_Measure; i ++) 
  { 
   Sound_signal = analogRead (pinSignal); 
    sum =sum + Sound_signal; 
  } 
 
  level = sum / num_Measure; // Calculate the average value   
  Serial.print("Sound Level: ");
  lcd.print("dB= ");
  Serial.println (level-33); 
  lcd.print(level-33);
  if(level-33<soundlow)
  {
    lcd.setCursor(0,2);
    lcd.print("Yukseklik=Dusuk");
     digitalWrite(redLed,LOW);
  }
  if(level-33>soundlow && level-33<soundmedium)
  {
    lcd.setCursor(0,2);
    lcd.print("Yukseklik=Orta");
     digitalWrite(redLed,LOW);
  }
  if(level-33>soundmedium)
  {
    lcd.setCursor(0,2);
    lcd.print("Yukseklik=Yuksek");   
    digitalWrite(redLed,HIGH);
  }
  sum = 0 ; // Reset the sum of the measurement values 
  delay(200);
  lcd.clear();
}