Historical Acoustics Acoustics, Ultrasound and Vibration Technology

@Intermall

Top: Science: Technology: Acoustics,_Ultrasound_and_Vibration: Historical_Acoustics:

• - 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)
  
• - Steven. J. Waller's Home Page
  
• - David Lubman of the Acoustical Society of America argues that the echo sounds like the primary call of the Mayan sacred bird, the Quetzal.
  
• - By Cynthia Gage (Atlantisrising)
  
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