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Since the beginning of modern science we have been solving the great mysteries around us. Because of recent advances in science and technology
we now have the ability to unravel some unknowns like never before.
The Ancient Theater of Epidaurus near Athens Greece was constructed in the late 4th century BC and is one of the best preserved ancient theaters. Even in ancient times, the theater was considered to have great acoustics. The actors can be perfectly heard by all 15,000 spectators without amplification. To demonstrate the theaters great acoustics tour guides have their groups scattered in the stands and then show them how faint sounds can be heard at center-stage. How this sound quality was achieved has been the source of academic and amateur speculation for many years. One of the theories suggested that prevailing winds were carrying the sounds. It turns out that that answer is in the seats. In 2007 researchers at the Georgia Institute of Technology have discovered that the limestone material of the seats provide a filtering effect suppressing low frequencies of voices, thus minimizing background crowd noise so the seats act as natural acoustic traps. It is still unknown whether the acoustic properties are the result of an accident or the product of advanced design.
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