Nicole Kidman and Keith Urban have a new baby, courtesy of a surrogate ... TMZ has learned. Sources tell us ... the baby was born at Centennial Medical Center in Nashville on December 28, 2010.
Quick Answer. When talking about dishwashers, decibels refers to the noise level a dishwasher produces when it is in operation. The quietest dishwashers have decibel ratings around 40 and slightly below, while the noise level in decibels of a normal conversation is about 60.
For instance, using the example of two machines each emitting a noise level of 90 dB: 1  Step 1: The numerical difference between the two levels is 0 dB (90-90= 0), using the first row. 2  Step 2: The number corresponding to this difference of 0, taken from the right hand column, is 3. 3  Step 3: Add 3 to the highest level, in this case 90.