Flutter
DV Pal 4:3, 00:03:45, colour, stereo, 2001/06
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
