Noise comes from a variety of sources in the workplace.  This includes manufacturing equipment, vehicles, power tools, even radios.  Regardless of the source, we need to take the steps to protect our hearing.  The first step is to identify the noise source and determine its decibel level.   Decibel level is the term used to measure the level of noise coming from the source. 

OSHA uses its Occupational Noise Exposure Standard, 29 CFR 1910.95, to guide industry to determine noise levels within their organization and comply with the standard.  Whether work is done indoors or outdoors, it is up to each employer to determine what those noise levels are.

OSHA requires employers to follow the standard if monitoring results are equal to or exceed the 8-hour time-weighted average (TWA) of 85 decibels (dBA).  This TWA is also known as the Action Level.  Employers can use dosimeters (properly calibrated) to determine levels of exposure.  Typically, dosimeters are placed around the collar area of the employee, during a normal workday.  At the end of the day, the results are calculated to gauge the exposure level of the job position.  If these exposures are at or greater than the Action Level, the employer is required to implement the following parts of the standard known as a Hearing Conservation Program.

• Monitoring – Monitoring is used to get a baseline of exposure to job titles.
• Employee Notification of the Results – Employee results of 85 decibels or higher must be notified of the results.
• Observation of monitoring – If requested, employers must offer the opportunity to observe any noise measurements.
• Audiometric Testing Program – include job titles whose results meet or exceed the action level
  1. Baseline Audiogram – perform initial audiogram testing for included employees
  2. Evaluation of the Audiogram – perform annual audiograms to determine any changes from year to year.
  3. Follow-up Procedures of the audiogram – if employees suffer a standard threshold shift (STS) what are the next steps.
• Hearing Protection – Offer hearing protection to all job titles that meet or exceed the action level.
• Training Program – Include an annual training program for employees.
• Access to Information and Training Materials – Make available a copy of the Standard for all employees.
• Recordkeeping – Employers must keep all monitoring records and audiograms as required by the standard.

If employees are exposed to noise at 90 decibels or higher, the employee must wear hearing protection. If employees are exposed to levels between 85-89 decibels, hearing protection must be offered.  In addition, results at or above the action level, requires employers to look at ways to reduce the noise levels.  Some of these noise reducing controls include baffles or foam to absorb noise, updating equipment with lower decibel output, proper maintenance on machinery for smoother running equipment, administrative controls such as employee rotation or enclosing of equipment to isolate noise.  Once you have implemented new engineering controls, monitor again and see if the results have changed.  If the results are below the action level, you may be able to discontinue the hearing conservation program.  

Protecting your employees hearing is key to a safe and healthy workplace.  Exposure to noise over time can be irreversible, so it is important to evaluate the noise in your facility and take the necessary precautions.  If you are unsure of the noise levels in your facility and you need assistance, contact Sedgwick, the Ohio BWC or a safety consulting group.

For questions or additional information please contact Andy Sawan at 330.819.4728 or andrew.sawan@sedgwick.com.