Different phase sensitivity of low- and high-frequency neurons from the cat's cochlear nucleus

When tested with two-tone signals while varying the phase value (omega 2) of the second harmonic, the low-frequency neurons (CFs from 0.8 to 5 kHz) showed one maximum and one minimum of the response value over the omega 2-range of 360 degrees. The high-frequency neurons (CFs from 11.5 to 38.5 kHz) showed two maxima and two minima under the same conditions. In addition, the high-frequency neurons, unlike the low-frequency ones, showed no difference in response to click series of opposite polarities. The data are considered in connection with processes of excitation in the low- and high-frequency regions of the cochlea.