Question: Where is the mailbox with the Abbott's name on it?
Question: If the waterfall prevents the creatures hearing them, why not live there?
Question: Why can't they just build a trap to hunt the beasts down?
Question: How would a deaf person know whether they're making a noise? Was the daughter constantly monitored, so she didn't inadvertently break a branch, slap her hand on a table, do anything that makes a noise?
Question: What were the fires for on top of the silos at night?
Question: Where is the electricity coming from? Surely all power plants would be out of commission after more than a year. Gas powered generators would be too noisy and alert the creatures.
Question: Why don't they just abandon the place and go to somewhere safer?
Question: Why not live underground most of the time and only emerge when necessary?
Question: Why is water flooding into the basement?
Question: How do the alien creatures orientate? They're blind but sensitive to noises, so I guess it is supposed to be some kind of echolocation - but first, echolocation is not a way of "seeing" your environments constantly, especially not suitable for running like crazy in a forest full of trees and obstacles. Second, by using echolocation, they should be able to locate moving objects even it's noiseless. So how?
Question: Who is running the power plants so that they can turn the lights on? I work at a power plant and it is not quiet.
Question: Where does all the power for monitors and lights come from? I assume power is down, a diesel aggregate would be too loud and hydropower too weak. Solar cells?