Theatres in the ancient world adequate sound was a sizeable problem. In the large, sloped spaces the issue of how to get sound to travel from the stage to the furthest seats was a constant problem. However, the Theatre of Epidaurus was renowned for the excellence of its acoustics - people at the back could hear the action of the stage as clear as someone in the front row. Yet the creation of such beautiful acoustics happened entirely by accident; the limestone seats used dampened low-frequency noise (such as shuffling or the murmuring of the crowd) and amplified high-frequency sounds (such as the bombastic voices of the actors on stage), carrying the entertainment all the way to the back row. Many attempts were made to recreate Epidaurus' acoustics, but no other theatre in the ancient world quite achieved the same sonic superiority.
