Figure 7.

Incrementally changing a pulse train's “on” time resulted in two categories of hair bundle responses. In both categories, increasing the pulse duration initially elevated the bundle's oscillation frequency. Afterward, some bundles experienced a peak in their oscillation frequency, followed by a frequency decline corresponding to the exhibition of spiking behavior (A). The other group of bundles displayed a plateau in their oscillation frequency (B). Error bars were calculated in the same manner described for the individual hair bundles in Figure 2C.