Stop YT video sounds after modal closed

snippet.js

// This was originally for a bootstrap modal

$(document).ready(function(){
  
  $('.modal').each(function(){
    var src = $(this).find('iframe').attr('src');

    $(this).on('click', function(){

      $(this).find('iframe').attr('src', '');
      $(this).find('iframe').attr('src', src);

    });
  });
  
});