Pokemon X and Y are the only games where shiny patches make a noise.
DPPT's shiny patches make no noise but shine for a second.
XY's shiny patches make a noise, then shake and shine for a second.
BDSP's shiny patches make no noise but stay shining.
Source: Watching a lot of Pokemon Radar videos and paying attention to the audio whenever there was a shiny patch.
Hope I helped!