Roles for Coincidence Detection in Coding Amplitude-Modulated Sounds
Fig 13
Effects of level difference on binaural temporal coding.
A. Simulated output spike rate of the model LSO neuron for non-modulating inputs (fm = 0 Hz). The ipsilateral sound pressure driving excitatory inputs was fixed at five different levels (25–45 dB) and the contralateral level was varied. B. Phase-tuning curves for different ILDs. C. ILD-dependence of the peak and trough spike rates of the phase-tuning curves. In B and C, the input modulation frequency and the average binaural level (defined as the arithmetic mean of the bilateral sound input levels) were fixed at 300 Hz and 20 dB, respectively, which corresponded to an input rate of 150 spikes/sec at ILD = 0.