If you live in a small house or condo it's still going to be loud enough to wake you up in the middle of the night when it starts. It's a bit more difficult than making a quiet dishwasher (which I'd still find too loud to start running in the middle of the night) since a dryer has to move a bunch of heavy, wet clothing around and run a fairly strong fan to avoid starting a fire.
If you live in a small house or condo it's still going to be loud enough to wake you up in the middle of the night when it starts. It's a bit more difficult than making a quiet dishwasher (which I'd still find too loud to start running in the middle of the night) since a dryer has to move a bunch of heavy, wet clothing around and run a fairly strong fan to avoid starting a fire.