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Air and bone (ABR aud nerve-brainstem resp (begin P12-14 (P22 adult-like)…

- - - - 55 dB HL
  - - - 80 dB HL
- - - - 95 dB HL
        
        P12
      - 20 dB HL
        
        P16
- - - - relative motion between oval window (skull) and the stapes
      - skull vibration
      - radiated from the external auditory
        meatus wall, following its vibration, to the tympanic
        membrane
- - - - Radioear
        B71
        
        checked by
        Bruel and Kjaer 4393
        accelerometer