NOISE-REDUCTION TECHNIQUES FOR PAPER CONVERTING MACHINERY

One-third and one-tenth octave band sound measurements were used to identify and isolate individual noise sources in several pieces of paper converting machinery. High-speed spur gears contributed noise from both tooth contact and ringing. Hollow steel rolls and cylinders also were found to be ringing. Perforator blade vibration (like a tuning fork) was a major source that is easily controlled. Noise control techniques used included: dampening of gears, rolls and cylinders, and perforator blades.