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5 COMPARISON OF SIMULATED AND MEASURED RESULTS 5.1 Auditorium 21 In Figure 15 measured and simulated values of EDT, T 30 , SPL (the G value with a source power of 31 dB), T s , C 80 and D 50 are displayed for P1 and five receiver positions at 1000 Hz. In addition an extra frequency band (125 Hz) is displayed for C 80 . The agreement between measured and simulated parameters at 1000 Hz is within 0.5 JND for most parameters which is very satisfactory. The difference between measured and simulated EDT varies from 0.01 to 0.07 seconds with an average deviation of 0.52 JND. As for T 30 , the difference between measured and simulated values varies from 0.01 to 0.03 seconds with an average deviation of 0.16 JND (it should be noted that the model was calibrated to match the average T 30 ). It is interesting to see that both measured and simulated values of EDT (1.98 and 1.96 seconds) are marginally higher that T 30 (1.89 and 1.91 seconds) so this undesired feature is detected in simulations as well as in the real room. Values of measured and simulated SPL, Ts, C 80 and D 50 are all in good agreement - and measured and simulated values agree on the variation with position. There is not space for graphs displaying the rest of the octave bands from 125 to 4000 Hz, but except for the 125 and 250 Hz band, which shows deviations above 1 JND, there seems to be a fine agreement here too. 20
R3 at 4,55 m R2 at 6,84 m R5 at 8,95 m R1 at 10,12 m R4 at 12,76 m R3 at 4,55 m R2 at 6,84 m R5 at 8,95 m R1 at 10,12 m R4 at 12,76 m C(80) (dB) D(50) R3 at 4,55 m R2 at 6,84 m R5 at 8,95 m R1 at 10,12 m R4 at 12,76 m R3 at 4,55 m R2 at 6,84 m R5 at 8,95 m R1 at 10,12 m R4 at 12,76 m SPL (dB) Ts (ms) R3 at 4,55 m R2 at 6,84 m R5 at 8,95 m R1 at 10,12 m R4 at 12,76 m R3 at 4,55 m R2 at 6,84 m R5 at 8,95 m R1 at 10,12 m R4 at 12,76 m EDT (s) T(30) (s) EDT at 1000 Hz T(30) at 1000 Hz 2,4 2,2 Simulated 2,1 Measured 2 Simulated Measured 2 1,8 1,6 1,9 1,8 1,7 Distance Odeon©1985-2013 Licensed SPL at 1000 to: Odeon Hz 20 Distance Odeon©1985-2013 Licensed Ts at 1000 to: Hz Odeon Simulated Measured 180 Simulated Measured 18 16 14 12 160 140 120 100 Distance Odeon©1985-2013 C(80) Licensed at 1000 to: Odeon Hz 2 1 0 -1 Distance Odeon©1985-2013 Licensed to: Odeon D(50) at 1000 Hz 0,6 Simulated Measured 0,5 0,4 Simulated Measured -2 -3 0,3 0,2 Distance Odeon©1985-2013 Licensed to: Odeon Distance Odeon©1985-2013 Licensed to: Odeon Figure 15: Simulated and measured room acoustic parameters for the five receivers in auditorium 21. Simulated parameters displayed with red square and measurements with blue cross. 21
Page 1 and 2: Toronto, Canada International Sympo
Page 3 and 4: Table 1: Room Acoustic Parameters i
Page 5 and 6: scattering coefficients have been a
Page 7 and 8: prediction of C 80 it is important
Page 9 and 10: SPL(dB) can be some influence from
Page 11 and 12: is used for separating multiple imp
Page 13 and 14: p x E-1 Impulse response recordings
Page 15 and 16: SPL / Noise (dB) an indicator wheth
Page 17 and 18: Ts (ms) SPL (dB) Statistics Active
Page 19: 4.3 Different excitation stimuli Fo
Page 23 and 24: In Figure 16 measured and simulated
Page 25 and 26: 6 CONCLUSIONS It is possible to mak

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