Phase information and hearing

Our brain's do not process phase information for slowly varying sounds but does respond to changes in amplitude and frequency.  Listen for yourself. (It will take a few moments for the sound to load.)  

The following file play a complex periodic wave with a fundamental frequency of 110Hz. 

Play file

  1. Verify that the waveform is changing shape in time but not amplitude or frequency content. 
  2. Does the timbre change as the file plays?