const int ledPin = 2;
const int analogPin = A0;
int PeakCount = 0;        
int lastPeakValue;

void setup() 
{
  Serial.begin(9600);
	pinMode( ledPin, OUTPUT);
}

void loop()
{
  int peakValue = analogRead( analogPin);

  if( lastPeakValue < 500 && peakValue >= 500)
  {
    
    peakValue++;
    Serial.print( "Bark !  (");
    Serial.print( peakValue);
    Serial.println( ")");
  }
  lastPeakValue = peakValue;
    	
  delay( 100); 
}