Prevention 

• An effective way of reducing noise is for a company to establish mandate that only allows machinery to be purchased that is less than 75 decibels.
• Vibration control (isolators, damping)
• Quiet materials for conveyors, bins (noiseless steel, plastic coatings, etc.)
• Silencers, mufflers, specially designed compressed air nozzles
• Balancing rotating parts, avoiding harmonic frequencies, etc.
• Avoiding impacts in process flow (slide instead of drop)
• Enclosures, barriers, curtains
• Sound absorbing acoustic wall/ceiling treatment
• Increasing distance from source