I think the best would be to have all the smoke detectors coupled together, so when one goes off, they all do. That amount of noise would get even my son (18 years old) out of bed. Many new homes may be built that way now-a-days. Mine isn't - all my detectors are stand-alones, going off independently. So my solution was just to have a lot of separate detectors and pray for the best: 11 smoke, and 2 CO in my house.