I had occasion to return to a workplace recently where I used to work during the 80's.
I made a discovery.
People's appearance can change quite substantially over time. But adult voices remain exactly the same. So if you haven't seen someone in a long time, I think you are more likely to recognise the voice than the face.
Now obviously people's accents CAN change as they move from place to place. And so can their intonation. But my observation is that the voices generally remain the same.