In article , bob haller wrote:
a friends son sleeps so soundly he wouldnt be woke up by a smoke
detectors alarm..does anyone sell one that would wake the dead?

That's not really what he needs.

Instead, he should get a smoke detector that plays a recorded message in
a parent's voice -- they're astonishingly effective. Kids *will*not* sleep
through Mom's voice saying "Jason, get up! The house is on fire!"

http://www.redi-exit.com/talking-smoke-alarms.html
http://gizmodo.com/034301/kidsmart-t...smoke-detector