Trying to get the doors to play the opening and closing sounds seperately/individually

I set up this script up and the doors enter the open, closed and locked states perfectly. The problem is that when the player opens the door it automatically plays the closing sound when the opening sound has finished and it sounds stupid because the door dosnt close unless the player tells it to.
I’ll add the script iv got so far below but any help that anyone could lend would be a greatly appreciated, thank you to any and all that respond. @Mavina.

public class new_door : MonoBehaviour {

	public bool open = false;
	public float doorOpenAngle = 90f;
	public float doorCloseAngle = 0f; 
	public float smooth = 40f;
	public bool isLocked = false; 
	public AudioClip openingSound;
	public AudioClip closingSound;
	public AudioClip lockedDoorSound;
	public AudioSource audioSource;

	void Start ()
	{
		audioSource = GetComponent<AudioSource> (); 
		if (audioSource == null)
		{ // if AudioSource is missing
			Debug.LogWarning("AudioSource component missing from this gameobject. Adding one.");
			// let's just add the AudioSource component dynamically
			audioSource = gameObject.AddComponent<AudioSource>();
		}
	}

	public void ChangeDoorState()
	{
		if (audioSource != null) // this should not ever be false because we validated it in Start()
		{
		if (isLocked != true) {
			open = !open;
			audioSource.PlayOneShot (openingSound);
		    }
			else
			{
				PlaylockedDoorSound ();
			}
		}
	}

	void PlaylockedDoorSound()
	{
		if (audioSource != null) // this should not ever be false because we validated it in Start()
		{
			audioSource.PlayOneShot (lockedDoorSound);
		}
	}

	void Update () 
	{
		if(open) // open == true 
		{
			Quaternion targetRotationOpen = Quaternion.Euler(0, doorOpenAngle, 0);
			transform.localRotation = Quaternion.Slerp(transform.localRotation, targetRotationOpen, smooth * Time.deltaTime);
		}
		else
		{
			Quaternion targetRotationClose = Quaternion.Euler(0, doorCloseAngle, 0);
			transform.localRotation = Quaternion.Slerp(transform.localRotation, targetRotationClose, smooth * Time.deltaTime);
		}
	}
}

@Mavina heres the interact script that talks to the doors.

public class Interact : MonoBehaviour
{
public string interactButton;

public float interactDistance = 3f; 
public LayerMask interactLayer; 

public Image interactIcon; 

public bool isInteracting;

void Start ()
{
	if(interactIcon != null)
	{
		interactIcon.enabled = false;
	}
}

void Update ()
{
	Ray ray = new Ray (transform.position, transform.forward);
	RaycastHit hit;

	if (Physics.Raycast (ray, out hit, interactDistance, interactLayer)) {
		if (isInteracting == false) {
			if (interactIcon != null) {
				interactIcon.enabled = true;
			}

			if (Input.GetButtonDown (interactButton)) {
				if (hit.collider.CompareTag ("Door")) {
					hit.collider.GetComponent<new_door> ().ChangeDoorState();
				} else if (hit.collider.CompareTag ("Key")) {
					hit.collider.GetComponent<New_key> ().Unlocknew_door ();
				}
			}
		} 	

	} else {
		interactIcon.enabled = false;
	}
}

}

I dont see how this is the script that will fix the problem though, in the door script i could get it so that both opening and closing sounds would play one after each other. I also had it so that it would play one but never play the other. i thought it would be by messing about with the door script that would fix it ?