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. 2001 Feb 13;98(5):2826–2831. doi: 10.1073/pnas.041604998

Figure 3.

Figure 3

Modulation of the EEOAE in the bobtail lizard by low-frequency sound. (a) An EEOAE waveform produced by injecting 3.5 μA of current at 1830 Hz. (b) The waveform measured under the same current conditions but with the microphone bias turned off. (c) As in a, but with a tone added at 86 Hz and 95 dB SPL. The time scale covers four cycles of the modulator waveform. (d) The amplitude of the EEOAE signal (●), the lower intermodulation side band (▿), and the upper side band (▵) as a function of the modulator level.