Consumer Guide to Dishwasher Noise Ratings

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The majority of dishwashers perform comparatively well. What causes the sometimes huge disparity in price is oftentimes the dishwasher noise rating. Unfortunately, there is no consensus in manufacturer ratings, but this guide can help you see through the ad copy.

The Hunt for the Mild Dishwasher

Kitchens invite friends and family members to congregate and stay, but with a push of the dishwasher “on” button, you may have the power of clearing out the room. A loud appliance makes the kitchen an uncomfortable position to be. Dishwasher manufacturers have caught on to the consumer hunt for the detached dishwasher, and they are including promises of peace and quiet in their ad copies.

Dishwasher Noise: Decibels by the Numbers

The Frigidaire Model FDB1502RGB promises the “UltraQuiet III sound insulation package” which produces 59 decibels. At a manufacturer suggested retail price of $330, this is an inexpensive model. Kenmore counters with its Model 13122 for $970, which boasts “QuietGuard™ Ultra sound insulation” that only lets 52 decibels escape. Bosch points to its Integra 800 Plus series Model SHX68E15UC, which – at $2,100 – promises “virtually silent” operations at a low 40 decibels. The ad boldly proclaims it to be the quietest dishwasher in the country.

For the sake of comparison, mediate that Astral Sound lists 10 to 20 decibels as being a gentle breeze stirring the canopy of trees, while 20 to 30 decibels indicate a hushed utter, such as you might encounter it at the library. 40 to 60 decibels are similar to background music at your favorite watering hole or eatery.

Entering the Sone: From Objective Sound to Perceived Loudness

There is another plan of measuring dishwasher noise: the sone rating. While decibels measure the objective sound at its various frequencies, sones only focus on the perceived loudness the human ear recognizes. Even though sones and decibels are not easily transferable, it is estimated that 10 decibels equal roughly .02 sones and 60 decibels translate into about four sones.

If this appears to be just another clever marketing ploy, consider the dishwasher industry’s attempt to parse the understanding of noise – as related to Appliance Magazine – by a Whirlpool executive. Dishwasher noise, he suggests, is not all about the annoying decibel level but there is also the pleasing sound of gurgling water. Thus, measuring all sounds in decibels may be like comparing apples to oranges, when it is in fact the sound quality that matters.

Since there is no dishwasher noise standard in the United States at this time, the use of “quiet” and its various synonyms continues in the industry, as will the sound differentiation between decibels and sones.

Insider Home Improvement Tip

Spend some time with your current dishwasher and seek to identify whether the gurgling water you hear enchants or annoys you. Look up its decibel rating and then visit the dishwasher retailer of your choice. Depending on the outcome of your sound experiment, you will most likely opt for a model with a lower decibel rating.

If the gurgling water is a nuisance, you need to opt for the lowest sone rating you can find. KitchenAid is jumping into the fray with its model KUDU02FR, which is allegedly so calm that the noise rating is offered only in sones: 2.9.

Sources
http://www.astralsound.com/the_decibel.htm
http://www.sengpielaudio.com/calculatorSonephon.htm
http://www.appliancemagazine.com/editorial.php? article=803&zone=1&first=1
http://forum.kitchenaid.com/forums/topic.asp? TOPIC_ID=3664