An oven that chimes when the temperature is right

When you start the oven it goes into a warm-up phase.  When the right temperature is reached a light turns off.  It means I have to watch that light once in a while to see if the oven is warm enough.

Why not let there be a small chime when the temperature is reached.

Not an electronic beep because there are already so many irritating sounds around us.  Just a nice little chime please.