sound installation, 2016

An installation without any speakers. Maybe natural sound, and 'real analog'.
I had been some trials with different objects, e.g. wood, plastic, and paper cylinder, with different methods, e.g. strike, echo, scratch, knock...
It is interested that I can hear an echo inside the paper cylinder, I would like to make some variations of the sound inside a cylinder by changing the sound inside the pipe.There are three sets of pipe with same length, position etc. By control the object from the end of the pipe, it change the wave of air, you can hear different tone from each pipe.