Normally, when the president and the staff sit together, the seating position at the head table is traditionally yang (superior), while other seats are yin (inferior). In traditional Chinese medicine, practiced for thousands of years, all things--both substances as well as processes--have yin and yang qualities.
Many manufacturers publish decibel ratings for dishwashers to help consumers compare operating noise levels. Normal conversation measures about 60 decibels, and some of the quietest dishwashers on the market rank at 39 to 40 decibels. When comparing the quietness of dishwashers, keep in mind that decibels measure sound intensity, and a few points can make a big difference. An increase of one decibel means a sound increase of 30 percent, while an increase of 3 decibels means a doubling of sound level. A dishwasher rated at 56 decibels is four times as loud as one rated at 53, or twice as loud as one rated at 50.
Gasoline powered leaf blowers create noise levels of 90-100 decibels at close range, and exceed the EPA's recommended maximum noise level of 80 decibels even at 50 feet. Many Greenwich residents in the high density neighborhoods regularly endure the noise of neighbors leaf blowers from less than 50 feet away!