# THE AUDITORY MODELING TOOLBOX

Applies to version: 1.2.0

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# VERHULST2018 - Cochlear transmission-line model (improved, incl. brainstem)

## Usage

output = verhulst2018(insig,fs,fc_flag)
[output, cf] = verhulst2018(insig,fs,fc_flag, ...)


## Input parameters

 insig the input signal to be processed. Each column is processed in parallel, so it is possible to run several simulations in parallel fs sampling rate (Hz) fc_flag list of frequencies specifying the probe positions along the basilar membrane, or all to probe all 1000 cochlear sections, or abr to probe 401 locations between 112 and 12000 Hz. numH number of high-SR fibers. Must be larger than zero. numM number of medium-SR fibers. Can be zero. numL number of low-SR fibers. Can be zero. ic calculate the IC responses

## Output parameters

 cf Center frequencies (Hz) of the probed basiliar membrane sections. output Structure with the following fields: fs_an Sample rate (Hz) of the output. fs_abr Sample rate (Hz) of the brainstem sections (IC, CN, W1, W3, and W5). w1 Wave 1, output of the AN model. w3 Wave 3, output of the CN model. w5 Wave 5, output of the IC model. an_summed Sum of HSR, MSR and LSR responses (per channel) and the input to the CN (modelled by verhulst2015_cn). Provided by default. Can be disabled by the flag no_an. ihc IHC receptor potential. Provided by default. Can be disabled by the flag no_ihc. cn Detailed output of the CN. Provided by default. Can be disabled by the flag no_cn. ic Detailed output of the IC. Provided by default. Can be disabled by the flag no_ic.

## Description

This function computes the basilar membrane displacement.

The output can optionally provide the following information:

 'anfH' responses of the high-SR fibers. Optional, only when called with flag anfH. 'anfM' responses of the medium-SR fibers. Optional, only when called with flag anfM. 'anfL' responses of the low-SR fibers. Optional, only when called with flag anfL. 'v' velocity of the basilar membrane sections [time section channel] and input to the AN (modelled by verhulst2018_ihctransduction. Optional, provided only when called with flag v. 'y' displacement of the basilar membrane sections [time section channel]. Can be disabled by the flag no_y. 'oae' ottoacoustic emission as sound pressure at the middle ear. Can be disabled by the flag oae.