Coming from HPA airsoft. A typical gun is 110db. I notice that pcp guns is about the same. Why is most 3d printed moderator has printed baffles and not some sort of foam? I changed from printed baffling to foam in my HPA gun and went from 100db to 64. I noticed lot of videos pcp is dropping only in the 70s. What makes the pcp different,is it the pressure difference?