1. CONCERT HALLS AROUND THE WORLD Physics of Music, Spring 2014

2. KENNEDY CENTER (WASHINGTON, DC)

3. DISNEY CONCERT HALL (LOS ANGELES, CA)

4. CARNEGIE HALL (NY CITY, NY)

5. STATE OPERA HOUSE (VIENNA, AUSTRIA)

6. BERLIN PHILHARMONIKER (BERLIN, GERMANY)

7. SYDNEY OPERA HOUSE (SYNDEY, AUSTRALIA)

8. BEIJING CONCERT HALL (BEIJING, CHINA)

9. ROYAL TEATRO COLON (BUENOS AIRES, ARGENTINA)

10. 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?

11. ROOM ACOUSTICS: SABINE’S LAW Physics of Music, Spring 2014

12. VISUALIZING REFLECTIONS

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

14. TEXTURE: SMOOTH OPERATOR? Ragged Decay Double-Slope

15. DESIRED REVERB TIME

16. SABINE’S 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”

17. COEFFICIENT OF ABSORPTION ::

18. REVERB TIMES AROUND THE WORLD

19. 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

20. 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