Do you have a source for that? I can tell with pretty good accuracy whether my students smoke from their voices (adult language learners, we take smoke breaks together and they have no reason to conceal it), and would be very surprised if I’m just that lucky and there’s nothing a person can pick up on acoustically.

Despite popular belief, even heavy smoking does not alter your voice in a significant way.

I guess you don't listen to Sinatra.

Depends on what you're smoking

Source: it came to me in a dream.