Fenster schliessen
2001/06, Juha van Ingen

DV Pal 4:3, colour, stereo

The image of tropical butterflies is accompanied by a low-frequency out-of-sync fluttering sound.

Flutter: In electronics, rapid variation of signal parameters, such as amplitude, phase and frequency. In structures, rapid periodic motion caused by interaction of structural mass, stiffness, and aerodynamic forces. ...Wikipedia