Funny story. When i was at the hospital yesterday doing pre-op, the lady in the lab taking my blood starting talking. Instantly I recognized her voice and thought she looked very familiar. Then it popped into my head. She used to be my regular waitress at our local German place (that sadly changed ownership and now sux) like 12 or more years ago. She was like, holy crap, how did you recognize me from so long ago. My short term memory is utterly useless now, but certain parts of my long term are still really keen. Voices for some reason stick in my head and numbers as long as a keypad is in front of me. I can still remember the sound of my dad's voice in my head, but can't visualize his face without a picture and he passed 13 years ago.
The day will come when you can visualize his face with perfect clarity. But I know what you mean. Faces and voices I can do. "I know them from somewhere" "Oh! I remember! I saw them in the canned goods section at the grocery store a couple of years ago"