Most LG dishwashers are quiet, according to The Home Depot. Dishwashers are measured for quietness based on decibels, or dB, which measure power and intensity of sound.
LG trademarked its LoDecibel quiet operation, which guarantees quieter operation and less vibration during wash cycles. Most LG dishwashers range between 42 and 50 decibels, which is generally considered quiet. Selecting a dishwasher with a decibel level of 45 or below allows for quiet operation that doesn't disrupt watching television or having conversations. Many newer model dishwashers, including LG, feature a lower decibel level and Energy Star rating to save money and run quietly.