Websites in Historical Acoustics

1. 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).
   http://www.tno.nl/instit/fel/museum/en/airacous.html
   
   
2. 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.
   http://www.ocasa.org/MayanPyramid.htm
   
   
3. Moving Beyond Prophecies & Predictions
   By Cynthia Gage (Atlantisrising)
   http://atlantisrising.com/issue9/ar9beyond.html
   
   
4. Rock Art Acoustics
   Steven. J. Waller's Home Page
   http://www.geocities.com/CapeCanaveral/9461/
   
   
5. Stone Structures and Sound
   
   http://easyweb.easynet.co.uk/~m.judge/stones.htm
   
   

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