Apples/Oranges Conversion
In the recent letter, “Noise Nonsense” (AW&ST April 25/May 2, p. 8) the calculation of decibel values was incorrect. A 42% reduction in a noise level of 80 db is a reduction of 2.44 db. The decibel scale is logarithmic not mathematical. Decibel values must be converted to real numbers before you can...
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