See Yabiya Omer 9 108:43.
Also, when you see OC 1:6, it’s entirely possible that R’ Ovadia did not hold that recorded Kol Isha (so long as there are no Hirhurim) is Assur outside of Devarim Shebikdushah.
I have heard from Talmidim of R’ Ovadiah (who I will keep nameless, because as far as I know they have never stated these things publicly) that of course R’ Ovadia knew what she looked like–her picture was on every street corner in Egypt when he lived there.