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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Hear Res. 2010 Nov 10;272(1-2):30–41. doi: 10.1016/j.heares.2010.11.003

Figure 3.

Figure 3

A: Representative cochlear microphonic (CM) recordings in response to a 500 Hz sinusoidal stimulus presented at systematically decreasing intensities (0–20 dB attenuation) from a single unoccluded ear. B: CM recordings as function of decreasing stimulus intensity upon introduction of ear plug. Though not all stimulus levels are demonstrated, for both the unoccluded (A) and occluded (B) conditions, the phase of the CM waveform as a function of stimulus SPL was constant over a wide range of stimulus levels and occlusion of the ear did not introduce amplitude-dependent phase shifts in the CM waveforms even though the amplitude of the CM changed considerably. Note the change in the scale of the ordinate from A to B as a result of occlusion.