def METHOD_NAME(filters):
    """
    Normalize filterbank such that the maximum frequency response is 0 dB
    :param numpy.array filters: filterbank with shape number_channels x filter_length
    :return: normalized filterbank
    :rtype: numpy.array
    """
    from scipy import signal
    for filt in range(filters.shape[0]):
        _, f_resp = signal.freqz(filters[filt, :])
        filters[filt, :] = filters[filt, :] / numpy.max(numpy.abs(f_resp))
    return filters