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Hearing of the animals. Acoustically evoked auditory brainstem responses measured before perfusion in one hearing (top) animal and one congenitally deaf (bottom) animal. In the hearing cat, the typical pattern of brainstem‐evoked responses can be observed to appear first at 15 dB SPLpe (arrows), whereas in the deaf cat no discernible responses can be identified up to 115 dB SPLpe. Stimulus: condensation click, 50 µs
