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Test frequencies with DRs (kHz) for subjects in the experimental group.
| Subject | Test Frequency with DRs (kHz) | ||||
|---|---|---|---|---|---|
| 1.0 | 1.5 | 2.0 | 3.0 | 4.0 | |
|
|
|||||
| E04 | X | X | X | X | |
| E14 | X | ||||
| E03 | X | X | |||
| E15 | X | ||||
| E16 | X | ||||
| E02 | X | X | |||
| E07 | X | X | |||
| E05 | X | X | X | ||
| E11 | X | ||||
| E12 | X | ||||
| E10 | X | X | |||
| E13 | X | X | |||
| E09 | X | ||||
| E08 | X | ||||
| E06 | X | ||||
| E17 | X | ||||
| E19 | X | ||||
| E20 | X | ||||
