One does not add decibels just like that, anymore than add the magnitude of two earthquakes. Adding the logarithms means the physical effects are being multiplied. Would care to specify what you are trying to calculate?
I have a Brandt Model 749 Portable Coin Counter/Packager, serial #680267 and I need two replacement...
(More)
I have a Brandt Model 749 Portable Coin Counter/Packager, serial #680267 and I need two replacement items for it. Who do I go to and how do I contact them? Thank you, Jane Dean Carroll County High School, Hillsville, Virginia 24343 276-728-2125