It's really interesting how this type of communication works, you can read up about the details on Wikipedia [1].
Also, this page [2] has some cool examples of sine-wave speech that you can listen to in order to understand how people can understand whistled speech.
Also, this page [2] has some cool examples of sine-wave speech that you can listen to in order to understand how people can understand whistled speech.
[1] https://en.wikipedia.org/wiki/Whistled_language [2] http://www.mrc-cbu.cam.ac.uk/people/matt.davis/sine-wave-spe...