The Decibel is a logarithmic relationship between two numbers. It is a unit widely used in telecommunications, for example in measurements of:: Gain or Attenuation of a device, Signal Noise Ratio (SNR), Common Mode Rejection Ratio (CMRR), etc.
For dB derivatives see: dBu, dBW, dBm, dBV, dBSPL or the WHITE PAPER: “The Decibel”.
