Did Hades accept visitors? The acoustical properties of the underground crypt of the Acheron Nekromanteion, Preveza, Greece.
The present paper is concerned with the acoustical properties of the archeological site designated as the underground crypt of the Acheron Nekromanteion, located in the prefecture of Preveza in northwestern Greece. A series of measurements, during 1997-2008, of the reverberation time (Rt) results together with 3D computer models of the space were then used with acoustic simulation software so that the measurements could be evaluated and explained meaningfully. It is noted that the Rt measured was more than 85% lower than that expected of a simple model of the room and 75% lower than the result obtained with a very detailed model of the room. The background noise measured was also extremely low, which combined with the low Rt make a very interesting combination that is rarely if ever found in nature but which approximates the soundscape found in a modern anechoic chamber (with all its intense psycho-acoustic phenomena). Searching for the explanations for such a deviation from the computer model predictions it was found that a quite simple and mathematical in nature explanation of at least a part of the phenomenon exists based on a law of acoustics called “Sabin’s Law”, which means that the conscious design of the place so as to have these properties by its designers is plausible and even probable.
Conference / Συνέδριο
Acheron Nekromanteion background noise reverberation time psycho-acoustic Underworld
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