On Friday 16 August 2013 09:15:13 pm al davis wrote: > That is misleading.
And that is precisely the point, and the reason this question comes up so often ! To shorten the story greatly, db is ALWAYS a power ratio reference by definition. Hence, zero was defined ( correctly so ) by Ma Bell many many years ago, when I was just a little lad, as 1 mw in 600 ohms, *THE* reference for all things bel. ( side note. Ma Bell deliberately defined the range to track the response of the human ear ( or human eye ) so as to relate directly to human perception of sound ( or light ) ratios ) Some years later, somewhere across the pond, 0 was incorrectly defined as 1 volt. Since voltage is not power, this is and was incorrect, and so has caused much confusion ever since. It *is* misleading. As long as anyone attempts to define voltage in terms that mean power, it will always be misleading. ( and it's now so entrenched, we can expect this will continue in perpetuity ) -- Cowboy http://cowboy.cwf1.com Clothes make the man. Naked people have little or no influence on society. -- Mark Twain _______________________________________________ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
