The Maya's adavanced acoustic engineering - Part I. 7 min 17 sec - Jan 21, 2007"The possibility that the Maya intentionally designed an acoustic waveguide 864 years ago seems particularly exciting." At least two structures at the Mayan ruins of Chichen Itza in Mexican display unusual and unexplained acoustical properties. In the western architectural tradition, flutter echoes are always acoustical design defects. Research suggests now that the Maya used acoustic engineering intentionally. My Second response video to The Mayan Calendar - Welcome to Evolution 2012.