Fundamental of the BM displacement at the 16 kHz BP in response to a single tone. (a) Magnitude of the gain at the 16 kHz BP in response to a single tone, plotted as a function of frequency and normalized to the maximum gain at 4 dB SPL. (b) Phase of the fundamental of the BM displacement (relative to the stapes) at the 16 kHz BP in response to a single tone, plotted as a function of frequency. (a and b, solid lines) Model predictions (for a 4 dB SPL, 54 dB SPL, and 104 dB SPL stimulation. (Dashed lines) Experimental data from Cooper (4) (for 10 dB SPL, 50 dB SPL, and 100 dB SPL sounds. (c) Magnitude of the BM displacement as a function of the intensity of stimulation at 16 kHz. (Solid line) Model predictions. (Dotted-dashed line) Data from Cooper (4). (Thick dashed line) Data from Zheng et al. (41).