es are thechurch of St. John Lateran in Rome and in the Salle des Cariatidesin the Louvre. In the Church of St. John Lateran (Fig. 8), each bay in the greatside aisles is a square having a ceiling which is approximately a por-tion of a sphere. At best, the approximation of the ceiling to a sphereis… … 268 WHISPERING GALLERIES mirror, has its foci nearly at head level. In consequence of this, twoobservers standing at opposite corners can whisper to each otherwith the ceiling as a reflecting surface. The curvature even in thisbay is not ideal for the production of a whispering gallery, so thatthus…
Architectural acoustics
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