Perhaps it's a language problem. We were discussing sound level. When you say, "range is a difference over any other variable...", it's common to infer from your use of the word "other", that you are saying that the term "range" applies to everything *except* sound level. Now, I know that this is not what you mean because you have previously used the term "range" as applied to sound level, specifically, "dynamic range". This use of language creates confusion for me. I have no idea what you objected to.
You've brought up frequency response. Now, frequency response is the common term for what is actually frequency range [20 - 20kHz]. Frequency response deviation is different both in that it is a measure of amplitude, not frequency, and in the way that the range is specified. It's a deviation from a reference, and is usually [mathematically] half the total range of the deviation. It is not uncommon, however, to have a two sided frequency response specification, i.e. +0.5, -1.0 dB. The total range of the deviation is then 1.5 dB. It is not dynamic. Range is a noun and refers to the difference between the maximum and minimum of anything. In this case, SPL. Dynamic is an adjective modifying range to mean the SPL is changing under observation or operation. I have no idea what your background is, but if you are educated in this area , and it will help you, speak to me as though I was an engineer with about 30 years experience in this and related areas, because I am. I'm sure we are just having some sort of minor language problem here. Regards, Bob... ---------------------------------------------------------------- They call it PMS because Mad Cow Disease was already taken. From: "Herb Chong" [EMAIL PROTECTED] > range is a difference over any other variable, including frequency, such as > frequency response deviations. > > From: "Bob Blakely" <[EMAIL PROTECTED]> > > > For equipment, this is the range over which the dynamics (changing sound > > levels) may be reproduced, recorded, etc. For the sound itself, it's the > > actual range of the of the sound loudest to softest. Usually, we desire > the > > dynamic range of the reproduction equipment to be larger than the dynamic > > range of the sound source. Sometimes not, so we crush the sound, > especially > > for such applications as AM broadcast. Change with time is expressly > > implied, else for the equipment no appreciable range is necessary, and as > to > > the sound itself, without change, the softest is the loudest and there is > no > > range, dynamic or otherwise.
