Two passive mechanical conditions modulate power generation by the outer hair cells
Fig 3
Location-dependent amplification and tuning.
Simulated responses to pure tone stimulations were plotted together with experimental results. (A) The displacement gain of the BM with respect to the stapes. The gain at four different locations (x = 9, 6, and 3 mm) versus stimulating frequency. The amplification is defined as the gain difference between the active and the passive peak responses. The experimental results were shifted downward by 17 dB for comparison. (B) The phase of the BM displacement with respect to the stapes. (C) Amplification factor versus longitudinal position. (D) Tuning quality versus longitudinal position. Experimental data: Ren & Nuttall (2001), Cooper & Rhode (1997), Ruggero & Temchin (2005). Cooper-Rhode data from Chinchilla are compared with similar best-frequency-locations of the gerbil cochlea (17 and 0.5 kHz at 2.2 and 11 mm, respectively).