The cochlear nonlinearity (solid lines), inferred from Eqs. 17, 18 and 19 respectively for three subjects (Experiment 1). The dashed lines show the hypothetical nonlinearity of Schairer et al. , as seen in Figure 3. It has been adjusted to start at the same point as the solid lines, which are made to originate at an “output” of 0 dB and at each subject’s absolute detection threshold for the probe-tone. The dotted lines extrapolate the inferred nonlinearities beyond the limits set by the measurements.