FIG. 5.
In a Kalman filter model, the time constant of the angular velocity estimate (velocity storage) depends on 2 parameters: the SD of the Gaussian-distributed noise on the canal signal (σv) and the bandwidth cutoff of stimulus internal model (β). Values of canal noise increase from left to right from 5 to 20°/s. Values for the bandwidth cutoff increase from top to bottom. The red dashed lines indicate the actual angular velocity, the gray lines show the estimated angular velocity, and the blue lines show the mean of that estimate during each second of the simulation. A 1st-order approximation of the transfer function proposed by Borah et al. (1988) was used; this does not affect behavior of the model for the frequencies of stimulation examined here.