function ref =  dbref(q)

%tstoolbox/@unit/dbref
%   returns reference value for 0 dB when calculating decibel values from
%   data of this unit.
%
% Copyright 1997-2001 DPI Goettingen, License http://www.physik3.gwdg.de/tstool/gpl.txt

ref = q.dBRef;
