They actually listen to Mom?

As any parent will tell you, children have selective hearing. We say "We should really get little Sally's hearing checked. I call her and call her and she just doesn't respond." While that is a good first step, the truth of the matter is that children push the limits of what they know they should and should not do every day. I know mine do. That's their job! Its natures way of reversing the grecian formula effect and contributing to the trap in the sink with your poor follicles! But in my reading today, I came across an article that I thought for sure was going to be a goof. I was wrong and glad to be so.
I know I often don't hear my alarm clock in the morning, but I would certainly hope I would hear my smoke alarm going off. But what about the kids? Seems there is some testing going on of a new smoke alarm that actually allows the user to record their voice, in this case the Mom's, but presumably, the Dad's too, onto the alarm and when it goes off it plays the recording and children tested are actually listening! What a novel idea, but more important, what a great experiment!
Please stop and take a moment to look over the article below.

http://parentcenter.babycenter.com/news/?id=535228&scid=pcbulletin:20061009:0:0:0#story