Why did they dub Sarah's voice?
In the scene where they are arguing (I've learned your language! You want me to come into your world? Come into mine! Learn to speak!) and Sarah lets out a scream with something to the effect of "Because this is my human voice! I sound like a freak!"
I noticed a discrepancy in the vocal recording. The first part of her line sounds like the boom mike on the set. The last part sounds like dubbed vocals in post-production. I know the actress is deaf, and, therefore probably really does sound like that. Why would they dub over her line if the whole point of her tantrum is show William Hurt (and the audience) how ugly her voice sounds or at least how ugly she thinks it is?