Tulsa Center of the Universe: An Acoustic Anomaly The Tulsa Center of the Universe is a worn concrete circle, approximately thirty inches in diameter, within the middle of another circle made up of thirteen bricks. Overall, the center is a little more than eight feet in diameter. The center of the universe is an acoustic anomaly; when one stands in the center of the circle and makes a noise, that noise is echoed back several times louder than it was made. Imagine dropping a small pin and expecting to hear a tiny “tink” as it hits the floor. Instead, the sound the pin makes is more like the loud crash of a gong. While this in itself is amazing, the truly amazing thing is that no one standing outside of the circle can hear a thing. A foghorn could be going off in the center of the circle, and those on the outside wouldn’t hear it. Or rather, that’s how the legend goes.