Q:

Why bigger stream of water in a metal sink is more silent than a smaller one?

I have a metal sink. I don't want to waste much water so I prefer smaller streams of water. But when the stream is small it makes a big noise. However, when I increase the flow, the tapping sound becomes absent and I can only hear the sound of the water flow.
My question is - why does the additional water reduce the noise of flowing water? I believe it has something to do with damping but I can't imagine the process. Probably the water particles in the middle don't make much noise because they are surrounded by other particles and sound waves are trapped inside. But what about the water around the stream? The stream's diameter is big and therefore there are more water particles on the borders than there are in the smaller stream. And more particles should make more noise.
I can make a video of the process I've described if I didn't myself clear enough. Tell me in the comment if you need it.

A:

I tried this on my kitchen sink and it's true.  A narrow stream almost separated into many dollops makes a loud resounding thudding, but a thick fast column of water is almost silent on the metal.
The reason is that the narrow, weaker, less continuous stream allows the metal to vibrate.
The thick, weighty, continuous stream deforms the metal and keeps it that way, doesn't allow the metal to spring back into shape, and there is no vibration.  The greater weight and pressure of the thick stream damps the resonance of the metal.
If you pressed a drumstick into a drumhead continuously, there would be no vibration.  But when  you allow the drumstick to bounce on the drumhead, there's vibration and sound.

