Table 3.
Patterns of the second experiment.
| 1st Vibration | 2nd Vibration | |
|---|---|---|
| set 1 | 100 Hz + 100 Hz | 100 Hz + 100 Hz |
| set 2 | 100 Hz + 100 Hz | 100 Hz + 105 Hz |
| set 3 | 100 Hz + 105 Hz | 100 Hz + 100 Hz |
| set 4 | 100 Hz + 105 Hz | 100 Hz + 105 Hz |
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