s=traindoppler;
traindoppler loads the 'traindoppler' signal. It is a recording of a train passing close by with a clearly audible doppler shift of the train whistle sound.
[sig,fs]=traindoppler additionally returns the sampling frequency fs.
The signal is 157058 samples long and sampled at 8 kHz.
The signal was obtained from http://www.fourmilab.ch/cship/doppler.html