This is a straightforward but realistic concept. My Mother likes to bake bread, but her hearing has diminished a little and when she’s in the living room looking through a reserve, she frequently doesn’t listen to the oven timer in the kitchen area signaling that her bread has completed baking. http://bookmarkloves.com/story5692938/the-smart-trick-of-the-best-gift-for-dad-on-his-birthday-that-nobody-is-discussing