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Concert Halls around the World. Physics of Music, Spring 2014. Kennedy Center (Washington, DC). Disney Concert Hall (Los Angeles, CA). Carnegie Hall (NY City, NY). State Opera House (Vienna, Austria). Berlin Philharmoniker (Berlin, Germany). Sydney Opera House ( Syndey , Australia).
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Concert Halls around the World Physics of Music, Spring 2014
To Ponder: • What specific features did you notice? • What are some common design principles? • Why might they be incorporated from a wave mechanics and listening standpoint?
Room Acoustics: Sabine’s Law Physics of Music, Spring 2014
Reverb time defined Time at which SIL decays (or would decay) by 60 dB
Texture: Smooth Operator? Ragged Decay Double-Slope
Sabine’s Law • Empirically derived formula for Reverb Time: • TR = 0.050 V/Sa • V = volume of room • Sa = totalabsorption area Wallace C. Sabine “Father of Acoustics”
Example Problem(The Krantz House Living Room, with 16 people?) 40 ft Floor = plywood (a = 0.11 @ 1000 Hz) Walls/Ceiling = glass (a = 0.04 @ 1000 Hz) 10 ft 20 ft
Citations • D. Hall, Musical Acoustics • http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revtim.html • http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revlow.html#c3