Bosch dishwashers can generate as little as 38 decibels due to the 18 different sound-reducing technologies that are used in the design. At its quietest, a Bosch dishwasher generates fewer decibels than a computer keyboard or the ocean; it's also quieter than the sound of washing one's own hands.
Reviews of the Bosch SHE3AR75UC dishwasher model summarized on ConsumerSearch also unanimously consider it as extremely quiet. Even portable Bosch dishwasher models, such as the Danby DDW1899WP generally receive favorable reviews regarding its quietness during operation. A review indicates that the only significant sound created by the portable Bosch dishwasher is during the water-draining section of its wash cycle.