FIG. 2.

Comparison of the frequency response to tones and synchronization to the binaural beat stimulus. A. The distributions of the CF to contralateral tones and best modulation frequency to the binaural beat stimulus. The CF for the majority of neurons tested was between 2,000 and 4,000 Hz. The modulation frequency responses were distributed from 20 to 566 Hz. No relationship was found between the neuron’s CF and the best modulation frequency. B. The comparison of the range of frequency response at the contralateral ear to the range of significant synchronization to a changing carrier frequency at the contralateral ear. Most neurons responded to a smaller range of frequencies for synchronization (i.e., most points lie below the diagonal, indicated by the solid line). The correlation between these measures was low (dotted line, r = 0.35).