2. Importing Model to Ecotect Anaysis.

3. .3ds geometry--Ecotect

5. Conclusion: Analysis will retard or take long time.

6. Revit and Ecotect Tag the object carefully in Revit for gbxml filetype!

7. Revit model tagged as shaded part and untagged as un-shaded part. To import gbxml format from revit for analysis, whole part should be completely tagged

8. Conclusion: Analysis will work but cylindrical geometry will be a mess as ecotect converts it into triangular components.

9. Cylinder computed by Ecotect becomes more complex triangular geometry Avoid Complex Geometry as far as possible.

10. Carefully deleted the outer cylindrical from imported xml file and created cylinder surface on ecotect so that analysis is done smoothly. More Simplified geometry for Ecotect Model

11. Acoustical Analysis

12. Set Sound Source and Reflectors (ceilings)

13. Generate Rays

14. Reflector position and orientation calculation Acoustical Analysis

15. Trial 1 Default

16. Trial 1 12m dia=30m

17. Trial 1 Default 12m dia=30m

18. Trial 1 Default 12m dia=30m

19. Trial 1 Default dia=30m 12m

20. Conclusion of Trial 1 More REVEB sound was detected. Hence need to modify -Geometry -Orientation (incident angle etc.) Material quality is kept as default. Hence parameters to control in the analysis are Reflectors (ceilings) property.

21. Trial 2 Lowering ceiling Decreased by 3m 9m dia=30m

22. Trial 2 Lowering ceiling Decreased by 3m 9m dia=30m

23. Decreased by 3m Trial 2 Lowering ceiling 9m dia=30m

24. Trial 3 Increased by 3m 15m dia=30m

25. Trial 3 15m dia=30m

26. Conclusion of Trials 2 and 3 As we change the heights of the ceiling, just above the stage, quality changes drastically As we lower more noise is observed As we higher the ceiling good quality is observed for same directed ray generated.

27. Material assignment to the Reflectors at height of 12m Acoustical Analysis

28. Assigning all reflectors as Acoustical Tile.

29. Table to feed different NRC Values

30. Feeding different Absorptive value for different frequency.

31. Adding Material-NRC.03 dia=30m 12m

32. Adding Material-NRC.03 12m dia=30m

33. Adding Material-NRC.61 dia=30m 12m

34. Adding Material-NRC.85 dia=30m 12m

35. Conclusion of different NRC Values For Higher Noise Reduction Coefficients (NRC 0.6 and above) most of the sound waves are observed that leads to Dryness of Sound which seems to be bad of an amphitheatre. For lower NRC(0.3) we have variety of sound variation which is not desired Hence selected NRC 0.56 which is 12 mm Mineral Fiber Material which is also fire resistant.

36. Adding Material-NRC.56 12m dia=30m

37. Adding Material-NRC.56 12m dia=30m

38. Results or Output from Ecotect Analysis. Acoustical Analysis

39. Acoustical Response

40. Sound Decay for different frequency

41. Reverberation Graph TOTAL SABINE NOR-ER MIL-SE FREQ. ABSPT. RT(60) RT(60) RT(60) ------------------------------------ 63Hz: 104.349 3.35 2.80 4.87 125Hz: 110.039 3.21 2.70 1.70 250Hz: 206.346 1.53 1.39 1.13 500Hz: 519.030 0.86 0.68 0.57 1kHz: 579.543 0.80 0.60 0.49 2kHz: 485.506 0.86 0.71 0.62 4kHz: 390.240 1.04 0.90 0.82 8kHz: 390.551 1.02 0.90 0.82 16kHz: 308.554 1.14 1.07 0.99

42. STATISTICAL ACOUSTICS - 18 Room Volume: 4070.390 m3 Surface Area: 761.794 m2 Occupancy: 680 (850 x 80%) Optimum RT (500Hz - Speech): 0.99 s Optimum RT (500Hz - Music): 1.65 s Volume per Seat: 4.789 m3 Minimum (Speech): 5.329 m3 Minimum (Music): 9.129 m3 Most Suitable: Norris-Eyring (Highly absorbant) Selected: Sabine (Uniformly distributed)