Audio issue - Trying Waitforseconds

Hello I'm trying to stop a sound from repeatedly playing on my GetKey command, while the button is hold the sound will play over and over although I only want it to play once every few seconds otherwise the sound gets really loud and irritating, I've tried to create a cooldown using a coroutine and it's not working, also if I put audio.Stop() in the IEnumerator then the sound doesn't play at all. Here's my code.

 using UnityEngine;
 using System.Collections;
 
 public class JumpScript : MonoBehaviour {
 
     Animator anim;
     public AudioClip JumpSound;
     public AudioClip SlidingSound;
     public float jumpSpeed = 1000f;
     float jumpRate = 1.2f;
     bool canJump = true;
     public float slideTime = 1.0f;
     public float timeHeld;
     
 
 
     void Start()
     {
         this.gameObject.AddComponent<AudioSource>();
         this.GetComponent<AudioSource>().clip = JumpSound;
         this.gameObject.AddComponent<AudioSource>();
         this.GetComponent<AudioSource>().clip = SlidingSound;
 
         anim = GetComponent<Animator>();
     }
 
 
     void Update() 
     {
         
         if (Input.GetKey(KeyCode.Space)) timeHeld += Time.deltaTime;
         
         if (Input.GetKeyUp(KeyCode.Space) && timeHeld <= slideTime) TryJump();
         if (Input.GetKey(KeyCode.Space) && timeHeld > slideTime) Slide();
         timeHeld = 0f;
         
     }
 
 
     void TryJump() 
     {
         if (!canJump) return;
         Jump();
         StartCoroutine(JumpCooldown());
     }
 
     IEnumerator JumpCooldown() 
     {
         canJump = false;
         yield return new WaitForSeconds(jumpRate);
         canJump = true;
         yield break;
     }
 
     IEnumerator SoundCooldown()
     {
         audio.Play();
         yield return new WaitForSeconds(2);
         audio.Stop();
     }
 
     void Jump() 
     {
         
         audio.PlayOneShot(JumpSound);
         rigidbody2D.AddForce(new Vector2(0, jumpSpeed));
         anim.Play("Jumping");
             
 
         }
 
     void Slide() 
     {
         
         audio.PlayOneShot (SlidingSound);
         anim.Play("Sliding");
         StartCoroutine(SoundCooldown());
                 
         
     }
 }