>impedance, low output impedance, for example)? I never could understand why
>people were willing to accept the generalization that we just multiply by
>two when talking about voltage or current ratios. It would make more sense
>to me to just consider it to be a log scale and specify what kind of ratio
>you were talking about (power, voltage, etc.) I used to get REALLY confused

this is why some measurements are specified as dBv (i.e. dB volts ratio). But
6dB is still classed as a 2:1 volts ratio, even though across a different
impedance.