Ivanq

foreach($a['salon'] as $i=>$v) {
    echo "$i: $v<br>\n";
}

height: calc(100vh - 200px - 300px);
/* height: calc(100vh - высота header'а - высота footer'а) */

height: 75vh;
/* для header: */
height: 10vh;
/* для footer: */
height: 15vh;

$.ajax("http://yoursite.ru/your/cool/path/your_cool_file.mp3", {
    success: function() {
        // Run your mp3 player
    },
    error: function() {
        alert("An error occured. We can not play the audio");
    }
});