My dish washer makes a tiny, feeble beep when it is done. I
would like a device about the size of a hockey puck that will
listen for this sound and then make a louder sound with a
flashing light until I open the dish washer (angle sensor magic
thingy) or push a button. It would have a magnet
on it, and
would be rechargeable.
Ideally, it could be programmed by pushing a button while
the dishwasher sound plays. Maybe it could sit idle for a
number of minutes and then pick the likeliest sound (above a
certain frequency).
The light would make it useful for really deaf people.