e not theoretically cor-rect and the phenomenon is far from perfect. This failure of loud-ness and distinctness in most of the multiple reflection galleries arisesnot from any progressive loss in the many reflections, for the loss ofenergy in reflection is practically negligible. Indeed, given… … Fig. 9. Salle des Cariatides, the Louvre, Paris. 270 WHISPERING GALLERIES small dimensions, gather into the phenomenon very large portions ofthe emergent and of the focused whisper. In both St. John Lateranand La Salle-Echo, the condensing mirrors are cylindrical and gatherthe sound horizontally…
Architectural acoustics
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