Topia!: Science: Technology: Acoustics, Ultrasound and Vibration: Historical Acoustics (9) Acoustical Detection of Aircrafts - From the first world war until the 30's air acoustics played an important role in the air defence. As radar was still to be discovered, vision had to be supplemented by hearing using the sound of the engines. (MUSEUM "WAALSDORP": TNO-FEL Museum). Archacous's Page - Scientific Applications of Acoustics to the Study of History (Acoustical Society of America) Rock Art Acoustics - Steven. J. Waller's Home Page Chirped Echo from the Mayan Pyramid of Kukulkan at Chichen Itza - David Lubman of the Acoustical Society of America argues that the echo sounds like the primary call of the Mayan sacred bird, the Quetzal. CESAR-LCPC : Ancient structures Stone Structures and Sound Moving Beyond Prophecies & Predictions - By Cynthia Gage (Atlantisrising) Mayan Ruins and Unexplained Acoustics - Discussion of various acoustical oddities of the Great Ballcourt and the Castillo at Chichen Itza and the pyramids at Palenque. The SPHINX Group -- Methods to Monolith, Leedskalnin Additional categories: Clothes Racks Chicago Bulls lane furniture ryobi string trimmers St Louis Cardinals

Historical Acoustics