Figure 3. Laser pulse- and acoustic click-induced basilar membrane vibrations.

(a–c) Laser pulse-induced BM vibrations at optical power from 1.5 to 15 μJ/pulse by 5 dB per step. Data in panels a–c were collected when laser pulses were focused on the bead (a) or on a location ~50 μm basal (b) or apical (c) to the bead. Data in panels a–c are from one cochlea and those in panels d and e from another. Those animals are different from that for data in Figure 2. The light-induced ringing responses disappeared in the insensitive cochlea (black line in panel d). (e) Click-induced BM responses at different sound levels are similar to the laser pulse-induced ringing responses.