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CONCERT HALLS AROUND THE WORLD Physics of Music, Spring 2014

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KENNEDY CENTER (WASHINGTON, DC)

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DISNEY CONCERT HALL (LOS ANGELES, CA)

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CARNEGIE HALL (NY CITY, NY)

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STATE OPERA HOUSE (VIENNA, AUSTRIA)

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BERLIN PHILHARMONIKER (BERLIN, GERMANY)

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SYDNEY OPERA HOUSE (SYNDEY, AUSTRALIA)

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BEIJING CONCERT HALL (BEIJING, CHINA)

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ROYAL TEATRO COLON (BUENOS AIRES, ARGENTINA)

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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?

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ROOM ACOUSTICS: SABINES LAW Physics of Music, Spring 2014

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VISUALIZING REFLECTIONS

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REVERB TIME DEFINED Time at which SIL decays (or would decay) by 60 dB

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TEXTURE: SMOOTH OPERATOR? Ragged Decay Double-Slope

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DESIRED REVERB TIME

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SABINES LAW Empirically derived formula for Reverb Time: T R = 0.050 V/S a V = volume of room S a = total absorption area Wallace C. Sabine Father of Acoustics

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COEFFICIENT OF ABSORPTION ::

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REVERB TIMES AROUND THE WORLD

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EXAMPLE PROBLEM (THE KRANTZ HOUSE LIVING ROOM, WITH 16 PEOPLE?) Floor = plywood ( = 0.11 @ 1000 Hz) Walls/Ceiling = glass ( = 0.04 @ 1000 Hz) 40 ft 20 ft 10 ft

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CITATIONS D. Hall, Musical Acoustics http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revtim.html http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revtim.html http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revlow.html#c3