%DEMO_VERHULST2012 Demo of the cochlear model calculating otoacoustic emissions
%  
%   This script computes and plot the otoacoustic emission for a 500 Hz sinusoid,
%   This is generated using the cochlear model described in verhulst2012
%   In particular otoacoustic emissions are computed as the signal difference between the
%   sound pressure at the middle ear with model non linearities and irregularities enabled,
%   and the sound pressure at the middle ear in case of linear model.
%
%   ..figure::
%
%      Output of the cochlear model.
%
%
%   See also: verhulst2012

fs=48000;
t=0:1.0/fs:0.05;
insig=zeros(length(t),2);
f0=500;
insig(:,1)=sin(2*pi*f0*t);
insig(:,2)=insig(:,1);
spl=[60,60];
irron=[1,0];
normalizeRms=[1 1];
subjectNo=rand();
fc='all';

[V,Y,OAE,CF]=verhulst2012(insig,fs,fc,spl,'normalize',normalizeRms,'subject',subjectNo,'irr',irron);

OtoacousticEmissionPa=OAE(:,1)-OAE(:,2);

figure; 
plot(t.*1e3,OtoacousticEmissionPa);
grid on;
xlabel('Time (ms)');
ylabel('Emission (Pa)');
title('Otoacoustic emission for a 500 Hz sinsuoid');