battlearray_client/Assets/Scripts/Sound/EffectSoundShoot.cs

using UnityEngine;
using System.Collections;

public class EffectSoundShoot : MonoBehaviour {

	private AudioSource audioSource;
	private float startTime;
	public float duration = float.MaxValue;

	void Start()
	{
		audioSource = GetComponent<AudioSource>();
		startTime = GameTime.time;
	}

	// Update is called once per frame
	void FixedUpdate () 
	{
		if(audioSource == null || !audioSource.isPlaying || GameTime.time - startTime >= duration)
		{
			Destroy(this.gameObject);
		}
	}
}