> What matters is whether it's close enough to the real person's voice to be an infringement.

Also not sufficient. There has to be some evidence they attempted to copy the voice rather than just found one that was eerily similar.

This comes up from time to time without AI either. Like its not good if a firm goes out to find someone with a voice similar to a famous person / voice actor…but its fine if they just randomly find one that sounds exactly the same and they say “oooh lets go with this one” and not “oooh perfect this sounds just like Dan LaFontaine!”