Table 1. Feedback control characteristics.
| Frequency Level | 1 | 2 | 3 | 4 | |
|---|---|---|---|---|---|
| Voice Coils | Frequency (Hz) | 5 | 10 | 50 | 100 |
| Duty Cycle (%) | 10 | 20 | 30 | 50 | |
| Vibrotactors | Voltage (V) | 1.5 | 2.2 | 3.1 | 4.5 |
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