Hate to tell the reporter, but that ain't quiet!
Is it the frogs that are of the greatest concern? Unfortunately, the map and directions to the monastery don't provide an actual street address so I can't get a satellite image to see how far away the pond is from any buildings.
I'm guessing also that the reporter was speaking of the sounds outside the buildings and I'd expect the outer walls of the Abbey to be around a foot thick....probably thick enough to insulate from "most" frog sounds when you're indoors :-)
"Quiet" is all a relative term of course....I would think that someone from, say, Manhattan would find it to be VERY quiet, whereas someone more accustomed to rural settings might not think it's so very different.
I think, though, that a big attraction would be the environment, where you're surrounded by people who are focused on a very noble mission....and the exclusion of thoughts and activities not relevant to that mission would provide a unique sort of quiet that sounds rather appealing, to me at least :-)