Infinite Audio In Javascript

I have a JavaScript that runs an audio, it is worth mentioning that I use ASP.NET and use SignalR, the question here is that when I load the screen, sometimes the sound enters a cycle and plays to infinity I leave the code below

$(function () {
    // Declare a proxy to reference the hub.
    var notifications = $.connection.MyHub;

    //debugger;
    // Create a function that the hub can call to broadcast messages.
    notifications.client.updateMessages = function () {
        getAllMessages()

    };
    // Start the connection.
    $.connection.hub.start().done(function () {
        //alert("connection started")
        //notifications.onconn();
        getAllMessages();
    }).fail(function (e) {
        alert(e);
    });
});
//var colorBk = "", llamadaBk;
function getAllMessages()
{
    var tbl = $('#messagesTable');
    var today = new Date();
    var dd = today.getDate();
    var mm = today.getMonth() + 1;
    var yyyy = today.getFullYear();
    var audio = document.getElementById('audio');

    if (dd < 10) {
        dd = '0' + dd
    }

    if (mm < 10) {
        mm = '0' + mm
    }


    $.ajax({
        url: '/Home/GetMessages',
        contentType: 'application/html ; charset:utf-8',
        type: 'GET',
        dataType: 'html'
    }).success(function (result) {
        var a2 = JSON.parse(result);
        tbl.empty();
        $.each(a2, function (key, value) {


            //alert(colorBk);
            //$("#date").html("<b>" + dd + '/' + mm + '/' + yyyy + "</b>");
            //document.getElementById("date").innerHTML = dd + '/' + mm + '/' + yyyy;
            $("#descripcionANDON").html("<b>" + value.status + "</b>");
            document.bgColor = value.color;
            //$("#tab").html("<audio id='audio' controls><source type='audio/wav' src=''></audio>");
            tbl.append('<tr>' + '<td>' + value.maquina + '</td>' + '</tr>');

            if (value.color == 'Red') {
                audio.setAttribute('src', '/sounds/InicioParo.wav');
            } else if (value.color == 'Yellow') {
                audio.setAttribute('src', '/sounds/GM140A MMTO.mp3');
            } else {
                audio.setAttribute('src', '/sounds/FinParo.wav');

                if (value.status == '') {
                    $("#descripcionANDON").html("<b> Operación Iniciada </b>");
                    document.bgColor = "Green"
                }
            }
             audio = document.getElementById('audio');
     audio.play();               
        });
        //alert(audio.paused);



        //if (audio.duration > 0 && !audio.paused) {

        //} else {


        //}

    })

}