Hi all. Suppose I am increasing the flow rate of the water through a sprinkler or a tube, there should be some vibration induced by this increment of flow rate, right? On the other hand, if I decrease the flow rate of the water through the same sprinker, there should also be vibration induced by this decrement of flow rate, isn't? So, in general, which type of vibration would be greater in these two cases? Intuition? Analytical equations? Experimental results?