I am working on converting the Book of Ruins (an old Judges Guild book), and I ran across something that made me want to get different opinions. One of the adventures says that there is a 25% chance per round of attracting the attention of occupants in another room. I was thinking of converting that to Listen Checks, but was curious what people might consider an appropriate DC for that. I am most interested in hearing why you feel it should be that value. Thanks for your input.