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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Hear Res. 2015 Dec 24;333:25–36. doi: 10.1016/j.heares.2015.12.007

Fig. 1.

Fig. 1

Auditory brainstem responses (ABR) conducted on one ear of (A) a hearing animal and (B) an early-deaf animal. In each panel, the waveforms are arranged according to stimulation intensity, from highest (80 dB SPL – top) to lowest (10 dB SPL – bottom). Stimuli consisted of clicks (0.1 ms, rarefication, 4000 repetitions) presented through a minispeaker positioned directly in front of the external acoustic meatus. For the hearing animal, hearing threshold occurred at ~20 dB SPL while no acoustically-induced activity was observed in the early-deaf animal at any stimulation intensity.