From an article in the Mirror by Joel Day and Susie Beever.
But the great mystery may have now been solved after a recent study involving a 3D printed model of the famous megalith has left scientists intrigued. Researchers from the University of Salford created the model to investigate how Stonehenge’s structure would have affected sounds coming from within it, finding it more or less soundproof.
Interestingly, they found that due to the placement of the stones, speech and music wouldn’t have projected beyond the structure itself. Sound engineer Trevor Cox and his team used laser scans of the site to print a 3D model, creating a miniature version of the monument.
The model, nicknamed “Stonehenge Lego” by Cox, was built assuming the original monument had 30 sarsen stones. Today’s Stonehenge has 63 complete stones, including 17 standing sarsen stones in the outer circle.
The team estimated a total of 157 stones erected at the site 5,000 years ago, printing 27 stones of various shapes and sizes. Using silicone moulds of these stones, they mixed plaster and other materials to recreate the remaining 130 items.
Each stone was designed to minimise sound absorption, similar to the real Stonehenge stones, Daily Express reports. In 2020, the team placed speakers and microphones around the construction and projected sounds into it, from low to high frequencies.
Despite Stonehenge’s many gaps, the sounds stayed inside the scale model for a short while. Reverberation time, a measure of how long it takes sound to decay by 60 decibels, averaged about 0.6 seconds inside the model for mid-frequency sounds.
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