https://law.justia.com/cases/federal/appellate-courts/F2/849...
> We need not and do not go so far as to hold that every imitation of a voice to advertise merchandise is actionable. We hold only that when a distinctive voice of a professional singer is widely known and is deliberately imitated in order to sell a product, the sellers have appropriated what is not theirs and have committed a tort in California.
Also sucks if you sound like Morgan Freeman. Put out of an entire line of work because someone was famous for sounding like you first.
Courts are quite aware that similar things can come from divergent sources.
Even copyright law fails to protect commonality between works that would be illegal if actually copied, but were arrived at legitimately and credibly independently.
Not saying someone shouldn't use common sense to avoid problems. Don't do Morgan Freeman impersonations comedically, then voice overs of movies.
For an example, what of voice impersonators? Sounding like Morgan Freeman is not unique to Morgan Freeman. What if a soundalike legally changes their name to Morgan Freeman? What if a lookalike changes their name?
I'm familiar with the existence of such laws but less so with how they are enforced or how they can even be enforced at all. The laws have never made that much sense to me.