Part 2 to my previous review..

Rating: 8/10 (16 July 2018)

To all the people asking why they didn't just sound proof everything: keep in mind that building a sound proof shelter would cause noise which would consequently lead to their deaths. Also, they might've chosen not to live by the river/waterfall because that might've been where the aliens hunted for some of their food. Who knows. Point is, it's a horror movie, so stop picking it apart and just enjoy it.
Oh, and to those saying it was dumb that their weakness was Emily Blunt's gun: their weakness was high-pitched frequencies, which made them vulnerable to weapons. There were only three in their area, but who knows how many more there were around the world to take out the military. So, again, quit nit-picking.