function [s,fs]=bat()
%BAT Load the 'bat' test signal
% Usage: s=bat;
%
% BAT loads the 'bat' signal. It is a 400 samples long recording
% of a bat chirp sampled with a sampling period of 7 microseconds.
% This gives a sampling rate of 143 kHz.
%
% [sig,fs]=BAT additionally returns the sampling frequency fs.
%
% The signal can be obtained from
% http://dsp.rice.edu/software/bat-echolocation-chirp
%
% Please acknowledge use of this data in publications as follows:
%
% The author wishes to thank Curtis Condon, Ken White, and Al Feng of
% the Beckman Institute of the University of Illinois for the bat data
% and for permission to use it in this paper.
%
% Examples:
% ---------
%
% Plot of 'bat' in the time-domain:
%
% plot((1:400)/143000,bat);
% xlabel('Time (seconds)');
% ylabel('Amplitude');
%
% Plot of 'bat' in the frequency-domain:
%
% plotfftreal(fftreal(bat),143000,90);
%
% Plot of 'bat' in the time-frequency-domain:
%
% sgram(bat,143000,90);
%
% See also: batmask
%
% Url: http://ltfat.github.io/doc/signals/bat.html
% Copyright (C) 2005-2023 Peter L. Soendergaard <peter@sonderport.dk> and others.
% This file is part of LTFAT version 2.6.0
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
% AUTHOR : Peter L. Søndergaard
% TESTING: TEST_SIGNALS
% REFERENCE: OK
if nargin>0
error('This function does not take input arguments.')
end;
f=mfilename('fullpath');
s=load('-ascii',[f,'.asc']);
fs=143000;