exports.calcRmsSync = (arr , n) => {
    var square = 0;
    var mean = 0;
    var root = 0;

    // Calculate square.
    for (i = 0; i < n; i++) {
        square += Math.pow(arr[i], 2);
    }

    // Calculate Mean.
    mean = (square /  (n));

    // Calculate Root.
    root =  Math.sqrt(mean);

    // Normalize the output
    root = root / 10

    return root;
}