Table 1 Frequency analysis cross-tabulated by task and vibration axis.
From: The effects of head movement on dual-axis cervical accelerometry signals
| Â | A-P direction | S-I direction | ||||
|---|---|---|---|---|---|---|
Tasks | f p | f c | BW | f p | f c | BW |
1. Tilt left | 0.52 ± 0.19 | 6.62 ± 7.85 | 19.5 ± 4.33 | 0.59 ± 0.22 | 5.23 ± 3.74†| 15.5 ± 5.06 |
2. Tilt right | 0.53 ± 0.19 | 5.40 ± 5.99 | 17.9 ± 4.99 | 0.70 ± 0.37 | 6.58 ± 4.47†| 20.1 ± 4.24 |
3. Tilt down | 0.50 ± 0.11 | 2.12 ± 1.36 | 18.3 ± 6.73 | 0.61 ± 0.27 | 8.26 ± 5.06†| 27.5 ± 7.86†|
4. Tilt back | 0.62 ± 0.25 | 1.69 ± 1.15 | 15.0 ± 3.16 | 0.64 ± 0.27 | 7.96 ± 6.96†| 27.3 ± 4.22†|
5. Rotate | 0.57 ± 0.18 | 2.68 ± 1.85 | 29.2 ± 8.35 | 0.67 ± 0.22 | 6.88 ± 5.59†| 31.4 ± 5.93 |
Overall | 0.55 ± 0.18 | 3.70 ± 3.63 | 19.9 ± 18.5 | 0.64 ± 0.28 | 6.98 ± 5.15†| 24.3 ± 21.1 |