I can't resist...
1. the silent dishwasher solution is to put a small LED light in the door that glows green when the washer is running and a second one that glows red when it is finished, or maybe an alarm that sounds on completion--like we have on clothes dryers and microwave ovens.
2. my land line phones (3 in the set) have ringer volume controls that enable me to turn down or mute the ringer. My cell phone has an "Airplane Mode" that prohibits inbound and outbound calls and (surprise) turns off the ringer. Hint: they all have that feature.
3. Some restrooms do have a large "trench" in the floor, or a long basin--no walls--for us manly males. You wouldn't be expected to know that, Ann.