Table 2 Shown in third, fourth, and fifth columns are the mean(std) of estimated acoustic parameters from audio recordings made with the built-in HP, built-in MacBook, and external microphones, respectively
From: Acoustic environment identification using unsupervised learning
| Â | Â | Microphones | ||
|---|---|---|---|---|
Environments | Mic1: Built-in (HP) | Mic2: Built-in(MacBook) | Mic3: External | |
Small office1 | Ï„ mean(std) | 42.95(1.46) | 30.86(0.53) | 50.68(0.74) |
|  | σ n mean(std) | 0.05(0.004) | 0.01(0.001) | 0.39((0.052) |
Small office2 | Ï„ mean(std) | 47.93(0.99) | 35.60(1.29) | 52.50(1.7) |
|  | σ mean(std) | 0.05(0.004) | 0.01(0.001) | 0.21(0.017) |
Small office3 | Ï„ mean(std) | 47.40(1.82) | 41.65(0.56) | 60.60(5.37) |
|  | σ mean(std) | 0.05 (0.005) | 0.01(0.001) | 0.01(0.001) |
Atrium | Ï„ mean(std) | 37.75(2.77) | 7.56(0.45) | 49.38(15.24) |
|  | σ mean(std) | 0.01(0.001) | 0.01(0.002) | 0.12(0.02) |
Restroom | Ï„ mean(std) | 133.48(1.01) | 106.28(4.41) | 135.05(4.38) |
|  | σ mean(std) | 0.04(0.003) | 0.01(0.001) | 0.2(0.016) |
Hallway | Ï„ mean(std) | 40.18(0.75) | 22.33(1.22) | 40.77(2.14) |
|  | σ mean(std) | 0.03(0.001) | 0.01(0.002) | 0.36(0.048) |
Outdoors1 | Ï„ mean(std) | 12.93(1.17) | 8.58(0.92) | 14.36(1.74) |
|  | σ mean(std) | 0.04(0.006) | 0.01(0.001) | 0.15(0.019) |
Outdoors2 | Ï„ mean(std) | 23.44(0.89) | 8.81(0.54) | 17.83 (0.92) |
|  | σ mean(std) | 0.04(0.006) | 0.01(0.001) | 0.25(0.031) |
Large office | Ï„ mean(std) | 35.03(0.72) | 19.84(2.12) | 46.0 (1.11) |
|  | σ mean(std) | 0.04(0.002) | 0.01(0.002) | 0.17(0.018) |
Stairs | Ï„ mean(std) | 72.82(1.74) | 51.73(2.42) | 116.11 (7.51) |
|  | σ mean(std) | 0.04(0.003) | 0.01(0.001) | 0.25(0.031) |