Hidden acoustic wonders called “whispering walls” have awed listeners since ancient times. The field of “archaeo-acoustics” studies the way sound and archaeological sites interact. Cathedrals and capital domes have been noted for the way they capture and amplify sound. A whispering gallery is usually a circular, hemispherical, or elliptical enclosure, often beneath a dome or a vault, in which whispers can be heard clearly in other parts of the gallery.

A whispering gallery allows whispered communication from one part of the internal side of the circumference to another specific part. The sound is carried by waves, known as whispering-gallery waves, that travel around the circumference clinging to the walls. This effect has been discovered in the whispering gallery of St Paul's Cathedral in London, the Statuary Hall in the U.S. Capitol, and Grand Central Station in New York, among others.

When a visitor stands at one focus the sound waves carry the words so that others will be able to hear the whispers from the opposite side of the gallery. Even when the room is filled with many people talking, the whisper can be heard, but only by standing in exactly the right location, others in the room won’t hear the whisper at all.

Possible Preaching Angle:

It is possible to hear the slightest whisper spoken in a massive room filled with people, but only when you stand in just the right place. In the same way, in a noisy, bustling world, it is possible to hear the “whisper” of God (1 Kings 19:12), but only if we are standing in the right place of obedience, readiness, and quiet waiting.