Do you know a multi-hole orifice valve?
What is the company that you have been used it?
Universally,companies that offer globe control valve will offer a multi-hole modification for either noise-control or cavitation control. 
Commonly the multihole unit is a cage with sometimes hundreds of holes drilled in it. 
For noise reduction, the flow is from the center outward, and the holes are very small-on the order of 1 mm diameter.  The characteristic frequency increases as the hole size decreases, so the noise generated by the very small holes is above the frequencies we hear well. Hole-spacing is also intended to cause acoustic cancellation at the characteristic frequency. 
For cavitation control, the flow is radially inward. The holes are typically larger-around 3mm.  Cavitation happens, but the jets meet in the center of the cage and the bubbles collapse in free volume where they do not cause damage.   
Multi-stage cages  are also used both for cavitation prevention and  for noise reduction. The cages are concentric and provide both numerous stages of pressure reduction, but also tortuous paths to control velocity. 
Multi-hole trims must be used with clean processes.  If there are particles, they make highly efficient(but difficult to clean) strainers. 

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