Richard Sapper's iconic 9091 Kettle for Alessi has a brass whistle that sends out a harmony of the notes "Mi" and "Ti," intended to recall the sound of river boats on the Rhine. Photo 3 of 7 in Sound and the Home by Aileen Kwun from Design for the Five Senses

Sound and the Home

3 of 7

Richard Sapper's iconic 9091 Kettle for Alessi has a brass whistle that sends out a harmony of the notes "Mi" and "Ti," intended to recall the sound of river boats on the Rhine.