Fig. 5.

Sound production in the X. borealis male larynx in response to bilateral laryngeal nerve stimulation. The loss of robust tension transients at ISIs close to release call rates is accompanied by a progressive loss of sound production ability (N=6 larynges). Three example traces from one larynx are shown. At 90 ms ISI (left), the larynx is capable of producing robust sound pulses following each stimulus. At 50 ms ISI (middle), the larynx produces two robust sound pulses, followed by additional sound pulses at a reduced intensity. At 40 ms ISI (right), sound pulses do not follow all nerve pulses; the larynx produces only two sound pulses at the beginning of the stimulus train and then falls silent.