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Mystery Signal of the Month   Dec 20 2003
We've got signal, but what the heck is it?
That's your mission.  Analyze this bébé.
 

mystery spectrogram                                                                                                                                                          

download the audio file 11.wav.gz

hints :

  • No need to gunzip this file since baudline can automatically uncompress files.
  • Setup baudline to be a Web Browser helper application as described in the FAQ.
  • Use the delta measurement bars to measure pitch change.
  • Use a Windowing function such as Kaiser or Gaussian and increase the beta variable to improve the time resolution.
  • Due to deficiencies in the .wav file format, the sample rate is not 1.0000 but it is 0.9766 samples per second.  Also note that the base frequency (0 Hz) is 59.8144 Hz.



What is it?

Click here for the answer.

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