With the exception of cells with characteristic frequencies (CF) below 1.0 kHz, the ipsilaterally evoked discharge of the majority of S-segment cells can be inhibited with simultaneous stimulation of the contralateral ear. The contralateral inhibitory CF is usually identical to the ipsi-lateral excitatory CF. The width of the contralateral inhibitory tuning curve is similar to the width of the ipsilateral excitatory tuning curve. Partial inhibition of the ipsilaterally evoked discharge increases the interspike interval width and increases the variability of the intervals. Inhibition, like excitation, is tonlcally acting. Contralateral stimulation is either as efficient as ipsilateral stimulation or less efficient, rarely more efficient.