FiG. 11. Plan and Elevation, with SectionalIndication, of Ear of Dionysius, Syracuse,Sicily. cal opening four or five feet square, scarcely visible, certainly notnoticeable, from below. This opening is into a short passageway … Fig. 12. View of Outer OpeDmg, the So-called Ear of Dionysius, Syracuse, Sicily. 276 WHISPERING GALLERIES which leads to a flight of steps and thence to the ground above (Fig.11). The grotto is noted for two somewhat inconsistent acousticalproperties. When being shown the grotto from below, ones…
Architectural acoustics
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