Flickering Light Help

Im making a flickering spotlight, i want the light to make a noise everytime it flickers, can anyone helps me, also i want the first person controller only be able to hear the sound when there within 15 ft of the spotlight If any one could help that would be nice. Heres my current script

 var minFlickerSpeed : float = 0.01;
 var maxFlickerSpeed : float = 0.1;
 var minLightIntensity : float = 0;
 var maxLightIntensity : float = 1;
  
 while (true)
 {
      light.enabled = true;
      light.intensity = Random.Range(minLightIntensity, maxLightIntensity);
      yield WaitForSeconds (Random.Range(minFlickerSpeed, maxFlickerSpeed ));
      light.enabled = false;
      yield WaitForSeconds (Random.Range(minFlickerSpeed, maxFlickerSpeed ));
 }