This is one of a series of Agitation Flutes I’ve made. Agitation Flutes are instruments in which a broad-spectrum noise with no clear frequency is introduced into a flute-like air column. The air column selects for and reinforces its own natural frequency. The ear recognizes the air-column pitch, but the tone is still awash in the surrounding noise. In the Breath Flute, the turbulence is created by blowing over the end of the flute from a slight distance in a way that does not set up the traditional well-defined flute tone. A tiny microphone picks up the resonated sound within the air column.
A video of this instrument can be found among the demonstrations in this youtube playlist.