Open Access
Table 2
The materials and their scaled absorption coefficients used in the scale model.
| Part | Material (thickness) | Absorption coefficients at octave bands (Hz) |
|||||
|---|---|---|---|---|---|---|---|
| 125 | 250 | 500 | 1k | 2k | 4k | ||
| Floor | Varnished MDF (12 mm) | 0.05 | 0.10 | 0.14 | 0.14 | 0.15 | 0.17 |
| Stage | Varnished MDF (12 mm) | ||||||
| Seats | PVC foam board (2 mm), felt | 0.13 | 0.15 | 0.21 | 0.41 | 0.48 | 0.58 |
| Audience | Unvarnished MDF (12 mm), felt, paper mass | 0.23 | 0.33 | 0.52 | 0.76 | 0.88 | 0.79 |
| Ceiling | Acrylic (5 mm) | ||||||
| Side walls | Unvarnished MDF (9 mm) | 0.04 | 0.07 | 0.12 | 0.13 | 0.14 | 0.18 |
| Front/Back wall | Unvarnished MDF (9 mm), acrylic (5 mm) | ||||||
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