Auditory spiketrain periodicities can encode both envelope and fine structure

Evidence

A very basic simulation has been performed to check for the potential use of various types of periodicity cues (i.e. TSFperiod , TEperiod or TE × TSFperiod ) with various signals used in the literature. The basic idea was to pass the stimulus through a dynamic compressive gammachirp (the default auditory filter-bank of the Auditory Image Model) (Irino and Patterson 2006 ) and to transform the output waveform into a spiketrain by using a threshold dependent model. This model has a higher probability to spike each time the output is over a threshold value (see Eq. 1 ). Moreover, a reasonable refractory period of 2500 Hz is added to the simulation. The periodicities of the spiketrain are finally extracted with an autocorrelation. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4622

Categorization

• DEFINE: Explains the three periodicity cue types (fine-structure, envelope, and their product) discriminated in pitch tests.
• XREF: connects to: Neural information is encoded in the patterning of voltage spikes — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 566