Whispering Gallery, Sound transmission gallery in Grand Central Terminal, United States.
The Whispering Gallery is an arched passageway in Grand Central Terminal where curved Guastavino tile vaults transmit sound between opposite corners with unusual clarity. The acoustical effect occurs because of how the arches direct sound waves, allowing whispers to travel distances that would normally require speaking.
The space was completed in 1913 as part of Grand Central Terminal's opening, when the building represented cutting-edge design for public transportation. The acoustic phenomenon was likely an unintended consequence of the architectural choices, though it has been enjoyed ever since.
For decades, travelers and New Yorkers have stopped here to test the acoustic effect by whispering across the space to friends or strangers. The spot has become a small ritual in the terminal, where people pause to experience this hidden interaction.
The location is on the lower level of the terminal near the Oyster Bar Restaurant and is easy to find when exploring the main concourse area. To experience the acoustic effect, stand at opposite diagonal corners of the archway and speak softly to someone across from you.
The acoustic effect comes from the precise angle of the Guastavino tiles, which were designed primarily for structural strength but accidentally created a sound-focusing feature. Whispers travel along the curved surface almost unchanged, arriving with the same volume and tone as if the person were standing right next to you.
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