String noise cam e come from various factors. The string and any recurve is always going to slap due to the fact that the string rests on the limbs. Too low of brace height will cause excess noise. Start with a high brace height and lower until the bow noises increases, the bow will tell you. Different string material, the more the stretch the the less the noise. Arrows spine incorrectly or arrows that are too light, thus the energy in the bow is lost and noise is the result. Lastly, placement location and type of material of string silencers. Experiment with distance form recurves. My preference is rubber band material as I feel that it stretches and it adds the least amount of weight to the string that robs performance.