Fig. 3.

Level-dependent modes of vibration near CF. Maps of vibration magnitudes evoked by the 22.6 kHz component of a multi-tone stimulus at three sound pressure levels: a 30, b 50, and c 70 dB SPL. Magnitudes are expressed in decibels relative to the 4.1-nm maximum observed at the location marked with the white asterisk in b (asterisks in a and c mark the sites of peak amplitudes at 30 and 70 dB SPL = 2.6 and 2.1 nm, respectively). Measurement beam ordinates are indicated at the base of each map using gray arrowheads. The structural framework of the organ of Corti is shown for reference in gray (cf. Figs. 1, 2). Data were obtained from the same preparation as in Fig. 2, CF 23 kHz