Adding Sound to an Existing Door Open Script

Hello, I am using a script that came with the Sci-Fi Styled Modular Pack in the Unity asset store which opens doors that come with the pack. I want to add sound when the door opens. I have been trying different ways of adding it to the script but none of them have worked so far. Any ideas?

Here is the existing code:

 #pragma strict
 
 
 private var anim : Animator;
 var character : GameObject;
 var distanceToOpen:float = 5;
 public var characterNearbyHash : int = Animator.StringToHash("character_nearby");
 
 function Start () {
     anim = GetComponent("Animator");
 }
 
 function Update () {
     var distance = Vector3.Distance(transform.position,character.transform.position);
 
     if (distanceToOpen>=distance){
         anim.SetBool(characterNearbyHash, true);
     }else{
         anim.SetBool(characterNearbyHash, false);
     }
   }