def signal_lf_hf_ratio(lf, hf):
    """Computes the ratio between the high and low frequency components of a signal
    Parameters
    :param lf: scalar
        Summation of low frequency energies in a signal
    :param hf: scalar
        Summation of high frequency energies in a signal
    :return: scalar
        Ratio of the high and low frequency energies in a signal
    """
    return lf / hf