Well we now have an area to discuss anything, lets remember to play nicely and respect other people.
We don't allow Google in the house on account of it not being house trained. But anyway, they didn't answer the question: lots of good stuff about why the kettle makes a noise, but nothing about why a pan (with lid on if you like!) doesnt. How often have you boiled water for your spaghetti and not realise its been on the stove boiling away for ages!? Not much noise you see...Do you not have google in your house? ....