Workplace Ergonomics and Hearing Health

Written By Alana Magee

In the realm of workplace ergonomics, much attention is given to posture, repetitive strain, and workstation design. Yet, one critical factor often overlooked is occupational noise exposure—a pervasive element that not only affects hearing but also contributes to fatigue, reduced concentration, and overall well-being throughout the workday.

Why Sound Levels Matter

The National Institute for Occupational Safety and Health (NIOSH) recommends an occupational noise exposure limit of 85 A-weighted decibels (dBA) averaged over an eight-hour workday (for federal workers its 87 decibels over 8 hrs). Exposure beyond this threshold is considered hazardous and necessitates the implementation of a hearing loss prevention program. [cdc.gov]

Exposure to noise levels above 85 dBA can pose a risk to hearing health, but the encouraging news is that noise-induced hearing loss (NIHL) is entirely preventable. While hearing changes may occur gradually and can be subtle at first, proactive measures make a significant difference. NIOSH emphasizes that with the right controls and protective strategies in place, individuals can maintain long-term hearing wellness and continue to thrive in their work environments. [cdc.gov]

Hearing Fatigue: The Hidden Cost

Beyond permanent hearing damage, hearing fatigue is a subtler but equally important concern. Continuous exposure to moderate or high noise levels can lead to:

These effects accumulate throughout the day, impacting not just productivity but also the mental and physical health of workers.

Ergonomic Implications of Noise

NIOSH and affiliated organizations highlight the need to integrate noise risk assessments into ergonomic evaluations. These assessments help identify non-auditory risks associated with noise, reinforcing the importance of a holistic approach to workplace health.

Measuring and Managing Noise

NIOSH recommends using sound level meters (SLMs) and personal dosimeters to accurately measure noise exposure. These tools help determine:

  • The Time Weighted Average (TWA) noise level over a shift

  • The noise dose, or percentage of allowable exposure reached

  • The source and frequency content of workplace noise [cdc.gov]

Creating noise maps of the workplace can further aid in identifying high-risk zones and implementing targeted controls, such as:

  • Engineering controls (e.g., quieter machinery, sound barriers)

  • Administrative controls (e.g., rotating tasks to limit exposure)

  • Personal protective equipment (e.g., earplugs or earmuffs)

How to protect:

For employers, safety professionals, and ergonomic consultants, addressing sound levels is not just a compliance issue—it’s a matter of long-term employee health and operational efficiency. By proactively managing noise exposure, organizations can:

  • Prevent hearing loss and reduce compensation claims

  • Enhance worker concentration and communication

  • Improve overall workplace satisfaction and performance

Incorporating sound level assessments into ergonomic evaluations ensures a more comprehensive approach to workplace health.

Alana O’Connor, Registered Kinesiologist
Ergonomist (AE)
Injury Prevention Plus

 

Alana Magee
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