Entering into a new space means stepping into a new acoustic arena. Whether subconscious or at the forefront of our attention, the way sound resonates in a built environment is part of a crafted experience influencing how people relate to a space. The presence of a circle or semi circle in architecture produces a specific phenomena which many encounter in passing. When an individual passes through the exact center of a dome their own voice is reflected back to them louder than any other sound in the present environment. 

Classified by some as “focalizers”, these instances occur predominantly in cathedrals or capital domes. Where some may simply pass through, others seek out this center point to experience their own private arena of sound. The acoustical reflection is immediate, clear, and amplified above any other surrounding noise. 

A related phenomenon is the "whispering wall", which occurs along a curved surface carrying even the slightest sound to a distant location. A well known site pictured above is the Whispering Gallery in Grand Central Terminal outside the Oyster Bar Restaurant. This occurrence is distinct from a "focalizer" however, which bounces sound back to the individual. 

Next time you find yourself in either of these structures give it a try. Grab a friend and get into position along a curved wall for a uniquely private experience. Or step up to the circular center point, be it a grate drain or an embellished insignia, and experience the sound of architecture.