Sound on attack

please someone help me i ned to put sound on my character’s attack and respect the cooldown but i don’t know how can i do it, and my enemy’s attack.

this is my character atack script:

using UnityEngine;
using System.Collections;

public class PlayerAttack : MonoBehaviour {
public GameObject currentTarget;
public GameObject currentTarget2;
public float attackTimer;
public float coolDown;

// Use this for initialization
void Start () {
	attackTimer = 0;
	coolDown = 0.5f;

}

// Update is called once per frame
void Update () 
{
	
	if(attackTimer > 0 )
		attackTimer -= Time.deltaTime;
	
	if(attackTimer < 0)
		attackTimer = 0;
	
	
	
	if(Input.GetMouseButtonDown(0)) 
	{
		if(attackTimer == 0) 
		{
			Attack();
			attackTimer = coolDown;
		}
	}
}

private void Attack() 
{
	if (currentTarget == null) return;
	{
	//if(Attack.gameObject.tag == "enemy");
	
	float distance = Vector3.Distance(currentTarget.transform.position, transform.position);
	
	Vector3 dir = (currentTarget.transform.position - transform.position).normalized;
	
	float direction = Vector3.Dot(dir, transform.forward);

	if(distance < 4.5f) {
		if(direction > 0) {
		EnemyHealth eh = (EnemyHealth)currentTarget.GetComponent("EnemyHealth");
		eh.AdjustCurrentHealth(-30);		
		}	
	}
			
	}	
	
}

public void OnTriggerEnter(Collider hit)
{
	if (hit.tag == "EnemyTrigger")
	{
		if (currentTarget == null)
			currentTarget = hit.transform.root.gameObject;	
	}
}

public void OnTriggerStay(Collider hit)
{
	if (hit.tag == "EnemyTrigger")
	{
		if (currentTarget == null)
			currentTarget = hit.transform.root.gameObject;	
	}
}

public void OnTriggerExit(Collider hit)
{
	if (hit.tag == "EnemyTrigger")
	{
		if (currentTarget != null) 
			currentTarget = null;	
	}
}

}

and this is my enemy attack code:

using UnityEngine;
using System.Collections;

public class EnemyAttack : MonoBehaviour {
public GameObject target;
public float attackTimer;
public float coolDown;

// Use this for initialization
void Start () {
	attackTimer = 0;
	coolDown = 0.5f;

}

// Update is called once per frame
void Update () {
	if(attackTimer > 0 )
		attackTimer -= Time.deltaTime;
	
	if(attackTimer < 0)
		attackTimer = 0;
	
	
	
	
		if(attackTimer == 0) {
		Attack();
			attackTimer = coolDown;
		}
	
}

private void Attack() {
	float distance = Vector3.Distance(target.transform.position, transform.position);
	
	Vector3 dir = (target.transform.position - transform.position).normalized;
	
	float direction = Vector3.Dot(dir, transform.forward);
	
	Debug.Log(direction);
	
		
	if(distance < 2.5f) {
		if(direction > 0) {
		PlayerHealth eh = (PlayerHealth)target.GetComponent("PlayerHealth");
		eh.AdjustCurrentHealth(-10);
		}	
	}
}

}

Only add the audio in each component (Player and Enemy), for example.

if(Input.GetButtonDown("Fire1")
{
  (...otherFunctionsHere....)
  Audio.Play()
}

Or, in your case

private void Attack() 
{
  Audio.Play()
}