Rubbing from Instrument panel?

Hi All,
I hear a rubbing that seems to be coming from the instrument panel.  It 
changes with the car speed, not the engine speed.  My thought was that it 
could be a speedometer cable gone bad but the speedometer registers
smoothly 
and I would think that if the cable was faulty then the speedometer needle

would vibrate in tandem with the noise.  I welcome anyone's thought on
what 
the noise might be.
Many thanks.
95 BBB