Your plant floor is loud. Between the machinery and crew, noise is just part of the industrial environment. But a workplace that is too loud isn’t just distracting; it’s dangerous. Being exposed to noise at or above certain decibels for too long can cause hearing loss. Due to this risk, OSHA imposes noise exposure requirements. Here’s what to know about these thresholds and how to comply with them.
The 85 dBA Threshold
OSHA draws a clear line at 85 decibels (dBA) measured as an eight-hour time-weighted average. Once your workers hit this exposure level, you need a hearing conservation program. You must use a decibel meter to determine your facility’s levels, but if your employees need to raise their voices to talk with someone 3 feet away, you’re probably already over 85 dBA.
What Your Hearing Conservation Program Must Include
Here is what OSHA requires once you cross that 85 dBA threshold:
- Noise monitoring: accurate measurements of worker exposure levels
- Annual audiometric testing: free hearing exams for affected employees
- Hearing protection: earplugs or earmuffs provided at no cost to workers
- Training: to help employees understand the risks and how to protect themselves
- Program evaluation: regular assessment of your controls and their effectiveness
The 90 dBA Action Level
At 90 dBA, OSHA’s requirements get stricter. Now you’re looking at mandatory engineering or administrative controls. This means you need to actually reduce the noise at its source, or you need to limit how long workers are exposed. Just handing out earplugs isn’t enough at this stage.
Engineering Controls
The most effective approach to lowering noise to a compliant level is to tackle it where it starts. For example, if you’re trying to silence a loud air compressor, you can switch to a quieter machine, add vibration pads, or install sound barriers.
You can also reposition workstations to increase distance from noise sources. Additionally, make sure you maintain all equipment properly, as worn-out parts usually produce more noise.
Administrative Controls
When you can’t eliminate the noise itself, you manage exposure time with these methods:
- Rotate workers through high-noise areas.
- Schedule noisy operations during shifts with fewer personnel present.
- Create quiet zones where workers can take acoustic breaks.
What You Should Do Now
Grab a sound level meter or download NIOSH’s free Sound Level Meter app. Walk your facility and take readings. Once you know where you stand noise-wise, you can build a program that protects your people.
Ultimately, the most important thing to know about OSHA’s noise exposure requirements is that the regulations exist because 22 million workers face potentially damaging noise exposure each year. Your facility doesn’t have to contribute to that number.
So, measure your exposure levels, implement the required programs, and prioritize engineering controls that eliminate the hazard rather than just managing it. You’ll be doing right by your employees, avoiding compliance fees, and creating a more pleasant work environment for all.
