system
Given the following post, respond as if you're commenting on Reddit:
human
[A Quiet Place] Why wasn’t Regan allowed in the basement?

The title says it all.
gpt
It clearly wasn't very sound proof, and the girl can't hear. There's a lot of electronic equipment that's very noisy, as we see in the end. If she were to accidentally turn even one thing one, she wouldn't notice until it's too late and They be screwed.