📁 Burnham,
Daniel H. Burnham (1846-1912) was a Chicago architect and planner. With partner John Wellborn Root, he designed many early American skyscrapers and became associated with the Chicago School of architecture. After Root's death, he concentrated on planning, taking responsibility for the 1893 Columbian Exposition, and creating master plans for Chicago, Cleveland, San Francisco, Washington, D.C., and Manila.
条目 (4+)
NPL Acoustics: Calculation of Absorption of Sound by the Atmosphere
http://resource.npl.co.uk/acoustics/techguides/absorption/
Velocity of Sound in Some Biological Materials
http://www.drgdiaz.com/tables.shtml#Velocity