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The number of animals used for each procedure.
| Procedure | Number of animals |
|---|---|
| Deafening technique, surgical approach, effectiveness of implantation and chronic stimulation | 4 |
| Depth of implantation | 2 |
| Preservation of binaural cues during chronic stimulation | |
| Video recording | 1 |
| External ear canal measurements | 16 |
| Jacket pocket measurements | 4 |
| Total | 27 |
