Hi Vivian, Vivian Meazza schrieb am 22.01.2009 11:17: > I would think that the attenuation of sound in air is amenable to > mathematical calculation. Yes it is. (at lest if your distance to the sound source is large compared to the size of the source). > Surely we shouldn't be guessing at some arbitrary > "reference distance"? > > The problem is, we don't know, which distance the author was thinking about, as he defined/recorded the sound. For in-cockpit sounds the distance from the sound source to the cockpit may be a good guess, for out-of cockpit sounds the typical viewing distance of the aircraft could be a good guess, too. Therefore we will have two different guesses for e.g. the engine sound (as long as there are no different sounds defined for cockpit and external view)... > Vivian > > Maik
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