Figure 5.

Physiological vulnerability of EEOAE in the bobtail lizard. The effect in one ear of diffusion of streptomycin from the electrode is shown as a function of elapsed time after placing the electrode in Scala media. Each panel in a–d covers four cycles of the modulator waveform. (a) Control measurement taken with a KCl electrode before streptomycin. (b) Waveform after 5 min of streptomycin in Scala media. (c) Waveform after 29 min. (d) Fall in the EEOAE level (●) as a function of time after placement of the streptomycin electrode at time 0. In the first hour, there is a great loss in the amplitude of the lower (▿) and upper (▵) side bands of the modulated signal.