Double Bass Do you have a "relative" homing pitch?

[Andy Mopley]

Context is ear training and ability to hear intervals without your instrument.
If you are not blessed with perfect pitch, do you have like a "home tone" that you hum, to use as a reference to sing an interval back to, and identify it?

I just discovered mine is the "E' note..

Hope I've made sense..

Regards to all

 

[Trimmo91]

Yes I sing an A and then attempt to figure out a note from there.