Table 4.
Deviation percentage and relative uncertainty of smartwatch 2 as compared to the reference vibrometer.
| Frequency (Hz) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Amplitude | 6.3 | 8 | 10 | 12.5 | 16 | 20 | 25 | 31.5 | 40 | 50 | 63 | 80 | |
| 10 m/s2 | ε (%) | −0.74 | 1.21 | 0.73 | 0.02 | 0.50 | 0.24 | −0.21 | −0.14 | 1.35 | 1.56 | 3.89 | 8.41 |
| Urel | ±3.1 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.1 | |
| 5 m/s2 | ε (%) | 0.89 | 0.23 | 0.31 | −0.49 | 0.15 | −0.10 | −0.59 | −0.26 | 1.20 | 1.29 | 3.63 | 7.71 |
| Urel | ±3.1 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | ±3.0 | |
| 1 m/s2 | ε (%) | 2.18 | −0.74 | −0.57 | −0.08 | 0.17 | 0.06 | −0.85 | −0.38 | 1.50 | 0.94 | 3.51 | 7.06 |
| Urel | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | ±3.1 | |
Values in red: deviation values greater than 6% with respect to the reference.