def METHOD_NAME(ds: xr.Dataset, Sv_label="Sv") -> xr.DataArray:
    """Helper function to convert volume backscattering strength (Sv) values to linear domain.
    Parameters
    ----------
    ds : xr.Dataset
    Sv_label : str
        Name of an xarray DataArray in `ds` containing volume backscattering strength (Sv).
    Returns
    -------
    xr.DataArray
    """
    return 10 ** (ds[Sv_label] / 10)