What are the main sources of noise on a commercial slicer?

Noise on a slicer typically originates from blade rotation and imbalance, motor and gear meshing, worn bearings, friction or impact in the feed mechanism, and panel resonance in the frame. When comparing machines, insist on sound-pressure readings taken at the same distance, load and room conditions; in a store, measure at the operator's ear rather than relying on no-load bench figures. A sharp whine usually points to blade balance, bearing clearance or loose fasteners. Before handover, log noise under continuous production both before and after cleaning, and attach those values to the machine documents as a reference for any later dispute.