Stonehenge once worked like a sound chamber.

In 2020, acoustic engineers built a one-twelfth scale model of Stonehenge as it stood around 2200 BCE. Inside, voices and music were amplified and echoed briefly, like in a small hall. Outside the circle, sound faded quickly.

Truth label: Established. Strong evidence and broad agreement among experts.

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Private ceremonies?

The effect would suit rituals meant for those inside the ring, not the crowd outside.

Intentional?

Nobody knows if the builders planned the sound or whether it came with the design.

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1. The model. The team rebuilt all 157 stones using 3D printing and measured the sound in a special chamber.

Test yourself

Sources

• Stonehenge

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