play tag <audio> secara otomatis ketika set interval berubah

Bagaimana caranya agar tag <audio> bisa play secara otomatis ketika setInterval berubah?

<audio id="suarabel" src="Airport_Bell.mp3"></audio>

    <h1 id="demo" onchange="myFunction()"></h1>

    <script>
        var myVar = setInterval(myTimer, 2000);

        function myTimer() {
            var d = new Date();
            var t = d.toLocaleTimeString();
            document.getElementById("demo").innerHTML = t;
        }

        function myFunction() {
            document.getElementById("suarabel").pause();
            document.getElementById("suarabel").currentTime = 0;
            document.getElementById("suarabel").play();
        }
    </script>