Research Article
Tuning of Estimated Sound Absorption Coefficient of Materials of Reverberation Room Method
Table 3
SAC measurement results of the impedance tube method and reverberation room method.
| Sound absorption coefficient | Frequency | 48K25 | 96K25 | 32K50 | 73K50 | Impedance tube method | Reverberation room method | Impedance tube method | Reverberation room method | Impedance tube method | Reverberation room method | Impedance tube method | Reverberation room method |
| 100 | 0.00 | 0.04 | 0.01 | 0.04 | 0.05 | 0.11 | 0.07 | 0.10 | 125 | 0.03 | 0.11 | 0.05 | 0.10 | 0.09 | 0.23 | 0.11 | 0.21 | 160 | 0.04 | 0.11 | 0.05 | 0.09 | 0.10 | 0.30 | 0.16 | 0.32 | 200 | 0.05 | 0.17 | 0.07 | 0.18 | 0.14 | 0.40 | 0.22 | 0.45 | 250 | 0.08 | 0.24 | 0.11 | 0.26 | 0.19 | 0.53 | 0.30 | 0.62 | 315 | 0.09 | 0.30 | 0.15 | 0.35 | 0.22 | 0.74 | 0.39 | 0.82 | 400 | 0.13 | 0.37 | 0.22 | 0.48 | 0.35 | 0.92 | 0.44 | 1.04 | 500 | 0.19 | 0.50 | 0.25 | 0.67 | 0.47 | 0.96 | 0.65 | 1.08 | 630 | 0.25 | 0.60 | 0.42 | 0.85 | 0.64 | 1.00 | 0.81 | 1.06 | 800 | 0.33 | 0.82 | 0.57 | 0.94 | 0.78 | 1.04 | 0.86 | 1.01 | 1000 | 0.42 | 0.84 | 0.68 | 0.91 | 0.88 | 0.96 | 0.85 | 0.96 | 1250 | 0.53 | 0.80 | 0.77 | 0.90 | 0.90 | 0.96 | 0.82 | 0.92 | 1600 | 0.67 | 0.81 | 0.89 | 0.95 | 0.88 | 0.93 | 0.74 | 0.92 | 2000 | 0.77 | 0.83 | 0.94 | 0.96 | 0.89 | 0.83 | 0.75 | 0.87 | 2500 | 0.90 | 0.78 | 0.98 | 0.95 | 0.93 | 0.85 | 0.81 | 0.89 | 3150 | 0.97 | 0.84 | 0.98 | 0.87 | 0.98 | 0.84 | 0.90 | 0.88 | 4000 | 1.00 | 0.81 | 0.96 | 0.86 | 0.98 | 0.86 | 0.92 | 0.84 | 5000 | 0.97 | 0.77 | 0.94 | 0.86 | 0.85 | 0.84 | 0.68 | 0.84 |
|
|