def downsampling(dw_factor, input_sfs):
    """ Downsamples sound fields given a downsampling factor.

        Args:
        dw_factor: int
        input_sfs: np.ndarray

        Returns: np.ndarray

        """
    return input_sfs[:, 0:input_sfs.shape[1]:dw_factor, 0:input_sfs.shape[2]:dw_factor, :]