Benchmark
Problems
Benchmark Problem B1-4T
-Properties-
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category
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type
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index
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domain
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object
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note
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B. interior
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1. practical
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B1-4T
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frequency
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reverberation room
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scattering
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Geometry: Rectangular room (5 m x 4 m x 3 m) with an absorbing material (1.8 m x 1.8 m x 0.05 m or 0.1 m ) and a point source. The absorbing material is modeled as flat surface.
Boundary condition:
All faces are assumed to be rigid except for a sound absorbing material on a floor. As the sound absorbing material, a glass wool with density of 32 kg/m3 is located in the center part on the floor. The locally-reactive boundary condition is assumed on the material surface and the surface impedance of the glass wool with rigid-back wall is given here. A point source is located at two positions S1(-2.3, -1.8, 0.2) or S2(-1.5, 0.0, 1.5), and produces the impulse at t=0.
Fig. B1-4T-1:
Geometry of problem B1-4T (unit: m).
-Task A-
Impulse response:
Input: volume acceleration [m3/s2] of the point source. Output: Sound pressure up to t=7.5 s at 6 points (-1.0, 0.0, 1.5) (R1), (0.0, 0.0, 1.5) (R2), (1.0, 0.0, 1.5) (R3), (0.0, -1.0, 1.5) (R4), (0.0,1.0, 1.5) (R5), (0.0, 0.0, 0.2) (R6).
Dataform:
d-b1-4ta.xls
Contribution: