30/10/2026
Built more than 2,300 years ago, the ancient theatre of Epidaurus continues to surprise acoustic researchers today. The human voice, spoken from its stage, can be heard with remarkable clarity even in the distant rows of its vast auditorium. But how was this possible without amplification?
For centuries, the answer was thought to lie primarily in the theatre's extraordinary geometry. In 2007, however, an acoustic study drew attention to a far less obvious detail: the limestone seating.
These regularly spaced rows of stone are more than places to sit. Their structure can attenuate certain low-frequency sounds, while allowing the higher frequencies essential to speech intelligibility to remain more prominent. Our hearing can then perceptually reconstruct some of the missing lower-frequency components from familiar speech patterns.
It is fascinating to think that, within an architectural structure thousands of years old, the shape, rhythm and arrangement of stone perform an acoustic function that modern research has only begun to explain in detail.
This way of thinking is fundamental to Prodigio Audio as well. In an electrostatic loudspeaker, the geometry of the radiating surface and its relationship with the surrounding space are inseparable from the quality of sound reproduction. Form does not emerge after the engineering is complete; it is an integral part of it.
A different era, a different technology, yet a shared pursuit: allowing sound to reach the listener with as little interference as possible, preserving its natural proportions.
FORM & SOUND Stories of form in the service of sound.
If you're curious about where sound, architecture and engineering meet, follow Prodigio Audio. More remarkable stories are on their way.
Credit: Georgia Institute of Technology, WorldHistory
