A similar aeolian phenomenon is flutter , caused by vortices on the leeward side of the wire .
Which is distinguished from gallop by aeolian phenomenon 's high - frequency ( 10 Hz ) , low - amplitude motion .
A similar aeolian phenomenon is flutter , caused by vortices on the leeward side of the wire , and which is distinguished from gallop by its high - frequency ( 10 Hz ) , low - amplitude motion .