The same person shouting will be heard at 74 decibels when you are 6 feet away from them. At 12 feet away, it becomes 68 decibels. When you continue this pattern, the shouting will be heard at 62 decibels from 24 feet away, and 56 decibels from 48 feet away. At this point, the shouting is only as loud as ordinary talking. Decibel Diagram
Using the logarithmic decibel scale, if a sound is 80 decibels, and we add another 10 decibels, the sound will be ten times more intense, and will seem about twice as loud to our ears. Sometimes we use different versions of decibels. A-weighted decibels, or “dBA,” are often used when describing sound level recommendations for healthy listening.
Feb 3, 2014 · The most quiet dishwashers compete on just one or two dBA levels – a difference that is unnoticeable or barely so. The Miele Futura Diamond dishwasher comes in at 37 dBA when used in its Extra Quiet Program mode; otherwise, it’s rated at 42 dBA. The Bosch 800 Plus comes in a close second at 38 dBA “in normal operation,” which I think Jun 16, 2012 · I find it easier to compare this wayeach 3 dBA is a doubling of sound pressure level. So 40 dBA is twice as loud as 37 dBA and 4 times as load as 34 dBA I'd suggest the 612 (9 - 36 dBA) and a damn fine performer for $50 dBA = 33.2 * LOG10(Sones) + 28 Sones dB Sones dB Sones dB Sones dB Sones dB Sones dB 1.00 28.00 13.00 64.98 25.00 74.41 37.00 80.06 49.00 84.11 61.00 87.27 . 305 265 454 345 484 795 143 592