ecotect sound analysis
DESCRIPTION
Building Simulation for analysis the sound quality of an amphitheater.TRANSCRIPT
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
Conclusion: Analysis will work but cylindrical geometry will be a mess as ecotect converts it into triangular components.
Cylinder computed by Ecotect becomes more complex triangular geometry
Avoid Complex Geometry as far as possible.
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
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.
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.
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.
Reverberation Graph
TOTAL SABINE NOR-ER MIL-SEFREQ. ABSPT. RT(60) RT(60) RT(60)------- -------- ------- ------- ------- 63Hz: 104.349 3.35 2.80 4.87125Hz: 110.039 3.21 2.70 1.70250Hz: 206.346 1.53 1.39 1.13500Hz: 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 0.8216kHz: 308.554 1.14 1.07 0.99
STATISTICAL ACOUSTICS - 18 Room
Volume: 4070.390 m3Surface Area: 761.794 m2Occupancy: 680 (850 x 80%)Optimum RT (500Hz - Speech): 0.99 sOptimum RT (500Hz - Music): 1.65 s
Volume per Seat: 4.789 m3Minimum (Speech): 5.329 m3Minimum (Music): 9.129 m3
Most Suitable: Norris-Eyring (Highly absorbant)Selected: Sabine (Uniformly distributed)