How to recognize if film is silent or has sound

Only films that have magnetic band(s) have the capability of having sound recorded onto them. Simply having a magnetic band on a film does not mean the film definitively has sound. It could still be silent if no sound was ever recorded onto it.

Silent (no bands)
Super-8
Normal 8

With one, or two, Magnetic Bands
Super-8
Super-8
Normal 8
Normal 8