Few people would describe dishwashers as quiet appliances, but you will find that some models offer less noisy operation than others. Manufacturers measure the noise level of dishwashers by providing the appliances' decibel measurement (dBA). A decibel rating of 41 to 52 allows for almost silent operation, according to the Lowe's Dishwasher Buying Guide. More expensive models tend to have lower decibel ratings than budget-priced dishwashers.
40 to 45 dBA
The KitchenAid KUDE70FXSS is one of the quietest dishwashers on the market, with a decibel measurement of 40 dba. The Bosch SHX68E15UC achieves the same ultra-quiet rating as the KitchenAid model. The Kenmore 14043 also performs well in the noise category, with a rating of 43 dba. The Bosch SHX58E15UC comes in at 45 dBA.
46 to 50 dBA
Slightly noisier dishwashers include the KitchenAid KUDE20IXSS at 46 dBA, the Bosch SHX45P05UC at 47 dBA and the GE CDWT980RSS and PDWT502RII at 48dBA. The Kenmore 13943 and 13929 have a higher rating at 49 dBA, as do the KitchenAid KUDS30FXSS and KUDS35FXSS.
50 to 55 dBA
At 50 dBA, you'll find the Bosch SHE6AP05UC. The GE GDWF100RBB, Kenmore 13902 and Whirlpool GU3600XTVY have a rating of 52 dba. At 53 dBA sits the Whirlpool GU2800XTVY. Expect 54 dBA from the GE GLD7460RSS. The Whirlpool DU018DWTB and Kenmore 15269 have a rating of 55 dBA.
56 dBA and Higher
The Whirlpool GU3100XTVS leans toward the high end of the noise scale with a rating of 56 dba. At 57 dBA, you'll find the GE GLD4466RSS, while the Kenmore 13449 is measured at 60 dBA and the Whirlpool DU1015XTXS rates 62 dba. The GE GSM2200NWW comes in at 64 dba. One of the noisiest options available to consumers is the Amana ADB1000AWB, with a rating of 69 dba. Its counterpart, the ADB1600AWB, has a measurement of 63 dBA.