def sound_power_level(power, reference_power=REFERENCE_POWER):
    """
    Sound power level :math:`L_{W}`.

    :param power: Sound power :math:`P`.
    :param reference_power: Reference sound power :math:`P_0`.

    .. math:: 10 \\log_{10}{ \\frac{P}{P_0}  }

    """
    return 10.0 * np.log10(reference_power/power)
dataset/ETHPy150Open python-acoustics/python-acoustics/acoustics/standards/iso_tr_25417_2007.py/sound_power_level/swapped operands of `/`