The spectrum of the sound generated by the model is a function of internal noise present in the network.

The main peak seems to remain in the order of 500-600 Hz, however central values show a resonant opposite trend (negative peaks around INLVL = 4). Noise is expressed in mV and frequency in 10⁴Hz, as in previous plots. Experimental settings: C = 0.4, neurons number = 20, tau = 10 ms, I current = 10mA.