As I understand it, the drum walk is one of many exercises to help you experience how, because we are vision-entic, we have foregotten to be aware of the sensory input of our hearing, touch, smell, etcetera. Be excluding vision with a blindfold, you experience navigation with your other senses and learn that your awareness of the feeling of slope, the sound and feel of what is underfoot, the echo-non echo / sound-deadening qualities of close objects, the smell of certain flora and fauna as you near them, and such are always being offered by your senses if you open your awareness to them.

Dim light navigation, stalking, moving quietly, back-tracking, and things I am sure I have not yet discovered can all be materially aided by wider use of more of the clues offered by our senses.

I continue as a student of these practices.