Three kids aged 12, 16 & 18 (one mine, two stepkids). Not one of them hears what I say the first time I say it. Half the time it's because they are plugged into music (OK I can't expect them to hear me with earphones in) but the rest of the time I think their default response to anything I say is 'pardon/sorry' even if they did actually hear me!! Husband can be the same as well to be fair. It's driving me a bit nuts - think I will take a vow of silence just to have to avoid repeating myself every flippin day!! Or just start yelling everything like a mad woman!