% fig5a
% Figure 5(a) of "Cancellation model of pitch perception" (JASA 97)

global sr;				% sampling rate
sr = 10000;
level = 90;			% dB
nchan = 2;			% number of BM channels
flo = 500;			% Hz - lowest BM channel frequency (fhi = sr/2)
N = 100;			% number of "presentations"


range = 0.0075; 	% s	- range for ACH

y = synth_complex1;

% scale
level = level - 30;	% 30 dB corresponds to RMS=1 in M&H's model.
y = rms(y, fromdB(level));

yy = bm_haircell(y, nchan, flo);

x = yy(1,:);		% take lowest channel
x = x .* 3;			% Meddis's model's output is a bit low
N=100;				% number of "stimulus presentations"
y =[];
for i = 1:N
	y = [y, spike_train(x, sr)];
end

% remove spikes close to onset
onset= 0.02;
y = y.*(y>=onset);
y = nonzeros(y)';

% autocorrelation histogram
z = ach1(y, range*sr, sr);
plot0(z);

m = max(z(2:size(z,2)));
ylim = get(gca, 'ylim');
ylim(2) = m * 1.2;
set(gca, 'ylim', ylim);

set(get(gca, 'title'), 'String',...
	'"Cancellation model of pitch perception" - Fig. 5a');