Neuronal firing thresholds shape which pitch periodicities a system can detect

Evidence

As a control, the effect of threshold value used in the simulation has been tested with one complex tone having a F0 equal to 1400 Hz (Fig. 5 ). Varying the threshold value have some important incidence on the predictions. Using a threshold below 0.3 does not provide reliable periodicities estimations. Using a threshold from 0.4 to 0.8 provides reliable and consistent estimations. Using a high threshold value (over 0.9) prevents to report any periodicities. Using 0.5 as in the previous simulations appears then to be a good compromise. It is worth noting that such a threshold model is physiologically plausible and could be related to the thresholds of the auditory nerve fibres previously described in the literature (Sachs and Abbas 1974 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 4638

Using a threshold below 0.3 does not provide reliable periodicities estimations. Using a threshold from 0.4 to 0.8 provides reliable and consistent estimations. Using a high threshold value (over 0.9) prevents to report any periodicities. Using 0.5 as in the previous simulations appears then to be a good compromise. It is worth noting that such a threshold model is physiologically plausible and could be related to the thresholds of the auditory nerve fibres previously described in the literature (Sachs and Abbas 1974 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 4651

Categorization

• XREF: Threshold-dependent periodicity detection connects to auditory nerve fiber rate-level functions (Sachs and Abbas 1974) and general neural spike-threshold gating.
• DEFINE: Clarifies how a threshold model maps onto auditory nerve fiber firing thresholds, linking a computational parameter to a physiological mechanism.
• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 4638; Dijk, Pim van, Physiology, Psychoacoustics and…, 4651