A noisy workplace may conjure images of hearing protection, but OSHA requires employers to consider engineering and work practice controls before using personal protective equipment. Reducing or eliminating noise can decrease the number of workers in a hearing conservation program. This not only protects workers’ hearing, but can save the company money.
To get started, conduct a noise assessment. Focus on areas where communication is difficult in a normal voice. Identify all noise sources and determine how the sound is transmitted to the room (it’s often amplified by vibration). Noise sources include motors, gears, belts, points of operation, and any other moving parts. Resonant transmitters include the frames, footings, and housings of equipment. First, consider engineering controls to reduce noise levels.
Source controls reduce the amount of noise generated. Examples include:
Path controls involve isolating, blocking, diverting, absorbing, or otherwise reducing noise intensity before it reaches employees’ ears. Examples include:
Even if hearing protection is still necessary, source and path controls that reduce total noise will also reduce the risk of hearing loss.
If engineering controls still don’t reduce noise to acceptable levels, consider work practice controls. These are changes in schedules or production such as operating noisy machinery on a second or third shift when fewer people are exposed, or rotating employees through quieter jobs to reduce noise exposure time.
Work practice controls are limited because changing jobs or production schedules is often not possible. In addition, rotating employees between jobs may increase the risk of small hearing loss in many workers.
Evaluating the workplace for noise levels can help identify hazards, but safety professionals may need to identify other potential problems or compliance concerns. Using the convenient checklists found in the J. J. Keller® SAFETY MANAGEMENT SUITE can help with this. You’ll find them in the Audits area within the Checklists link. We’ve provided checklists on more than 100 topics ranging from Aerial Lifts to Warehouses.