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Standard deviation of residual of the model based on A-weight filter estimated by means of measurements at 8 frequencies carried out by 25 participants.
| Calibration method | Model residual (dB), SD |
| Modulated signal | 7.11 |
| Dual tone (5 dB) | 6.58 |
| Dual tone (2 dB) | 6.36 |
| Ascending (5-dB step) | 6.50 |
| Ascending (2-dB step) | 7.18 |
| Bekesy (continual) | 6.52 |
| Bekesy (modulated) | 5.69 |
