Weighing machines for the confectionery industry are a very common noise problem. In this case, the purchaser had implemented our Buy Quiet policy for new plant, with a target of 75dB(A) for this particular installation. One of our engineers attended the new machine proving trials at Easiweigh as part of the purchasing policy process to determine what would constitute best practice to meet the noise specification. We developed a set of modifications that reduced the initial 83dB(A) Leq noise level down to the required 75dBLAeq.
The low cost, high hygiene modifications included replacing the conventional (and non-hygienic) damping materials with much higher performance stainless constrained layer damping. This has since been adopted as standard practice on all new weighing machines.