dB Gain -- was RE: [K3] [Elecraft] FLx GN Adding Db gain

[Jim Brown]

At the risk of being pedantic, the correct unit is the deciBel, one 
tenth of a Bel, and the correct abbreviation is dB (not Db).  The 
Bel is a unit of change in loudness and is named after Alexander 
Graham Bell. Because the way humans hear is logarithmic (as is our 
perception of light), the Bel (and the deciBel) are the log of the 
ratio of sound levels, and are translated into the log of power 
levels and voltage levels corresponding to that loudness change. 

73,

Jim K9YC