To flow or move with a low slapping sound
Lovely deep burble at low revs without being too loud.
The most significant improvement in the sound was the elimination of the low burble you always get with LV disks.
Mine gets a hint of a rich burble when temps go above 90.
burble zone emanating from the rabbit and will fall out of the formation.
burble take the stage one by one to a background of beeping burbling synth.