how can mute all sounds in the Scene?

It’s my code to play a sound and it works fine.

public AudioSource sound1;
public AudioSource sound2;
public AudioSource sound3;
public AudioSource sound4;

public void Sound1(){

	sound1.Play ();

}

public void Sound2(){

	sound2.Play ();

}

public void Sound3(){

	sound3.Play ();

}

public void Sound4(){

	sound4.Play ();

}

they work fine how could I mute them when I click on a button?
I mean I can use sound.volume = 0; ,but I have to use it for all of them ? any idea?

You could just disable the audio listener via the script