User blog comment:Regimango/I have a question for y'all/@comment-27304481-20160902055350

I would say it is small enough to require two different blasts, as in one blast on one hemisphere, then the other. That gives Rose enough warning to prepare herself from the random light and song that starts playing. Normal light and sound boundaries would probably not work, it would need to be super deep probably, something very insulating. And this can be re adjusted via creating elaborate methods by which they happenned to avoid the corrupting light.