Background:  I'm a part time Basso Profundo opera singer.  That means, my voice is as bassy as a human voice can get.  The call went like this:

Me (with my normal bassy voice):  Hello?

3133737460: Jennifer?

Me:  Eerrrr.... No?

3133737460: Is this jennifer?

Me (speaking at an extra low range so he would get a clue):  I don't think so.

3133737460: Jennifer Chu?

Me (hitting really *REALLY* low keys by now): Eerrrr.... No?

3133737460: Sorry about that that. We'll update our records. Have a good night.

Me (in a voice that shakes the glasses on any counter):  Goodnight sweetie.