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Acceleration amplitude offset with our developed system from the reference distance of 3 mm of the BC transducer with coil–coil distance of our system measured on the artificial mastoid at 1 kHz. The acceleration amplitude differences at 1 kHz between the maximum amplitude at 3 mm (Fig. 6c) and other distances are represented.
| Dist. [mm] | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Δ Amp. [dB] | 0.3 | 0.0 | 0.0 | — | 0.8 | 1.5 | 2.4 | 3.5 | 4.4 | 5.5 | 6.5 | 7.6 | 8.6 | 9.7 | 10.4 | 11.5 |
