Refrigerators and freezers consume about a sixth of all electricity in a typical American home - using more electricity than any other single household appliance.This is relevant to your question as efficiency will closely correlate with quietness. Efficiency rating listings are easy to find for fridges, quietness listings much less so.
Fortunately, refrigerators have gotten much more efficient over the past 20 years. While there still is room for improvement, today's refrigerators use 60 percent less electricity on average than 20-year-old models.
If you have an old style, inefficient refrigerator, it may be costing you as much as $280 a year in electricity in areas with high electrical rates. That means that a new, more efficient model will pay for itself just from the energy savings alone.
Californian Energy Commission
posted by winston at 11:29 AM on April 1, 2008