When soiling was introduced (simulating a true, at-home application), a leading manufacturer, who aggressively promotes low sound levels, recorded an increase of 6 decibel levels as compared to advertised sound levels. A significant and audible difference, given that noise levels double with every 3 dBas. Miele, however, measured up to the same, no matter whether the load was clean or soiled. No increase in decibel levels was reported, despite the performance requirement changes necessary to successfully handle the cleaning task at hand.What was heard? The SoundTruth™ of a Miele dishwasher.