public var soundClip : AudioClip[];
 private var looper : int = 0;

     function OnTriggerStay (col:Collider){

          if(Input.GetKey("e")) {
              if(!audio.isPlaying)
              {
                      audio.clip = soundClip[looper];
                      audio.Play();
                      looper++;
                      looper = looper%soundClip.Length;
                    gameObject.DestroyObject(GameObject);
             }

          }
      }




When u press the E key it plays sound and then Destroy The Object.