The BM vibration measured from a longitudinal location ∼2.5 mm from the cochlear base.

<p>The magnitude (A), phase (B), the magnitude ratio of the BM to the stapes (C), and phase difference between the stapes and BM (D) are presented as a function of frequency. Panels A and C show high sensitivity, sharp tuning, and nonlinear compression while panels B and D show that the phase decreases with frequency at an accelerated rate, indicating cochlear dispersion.