When is hearing protection mandatory at work?
When is hearing protection mandatory at work?
When is hearing protection mandatory at work?
In South Africa, the rules are governed by the Noise Exposure Regulations, 2024. Companies should focus on two distinct thresholds: the standard Noise-Rating Limit and the more specific Noise Action Level.
1. The critical thresholds
The law defines specific levels at which an environment becomes a 'noise zone'. If your workplace meets these criteria, strict obligations apply.
- The standard limit (Noise-Rating Limit). Continuous noise: An 8-hour rating level (LEX,8h) of 85 dBA or higher. Impulse noise: A peak noise level (LCpeak) of 137 dB(C) or higher.
- The lower limit (Noise Action Level). This applies specifically if employees are also exposed to ototoxic chemical agents (chemicals that damage hearing) or whole-body vibration. Continuous noise: An 8-hour rating level of 82 dB(A) or higher. Impulse noise: A peak noise level of 135 dB(C) or higher.
2. Obligations in a 'noise zone'
If an area or a piece of machinery exceeds the limits mentioned above, it is legally classified as a noise zone.
- Mandatory entry: No person is allowed to enter or remain in a noise zone unless they are wearing effective hearing protective devices (HPDs).
- Demarcation: The employer must clearly demarcate these zones (or mobile machinery) with visible signage.
- Employee duty: Employees are legally obligated to inspect, use, and wear their HPDs strictly in accordance with training and instructions.
3. Requirements for the protection (HPDs)
It is not enough to simply provide earplugs. The regulations require specific performance standards from the protection provided:
- Effectiveness: The HPDs must be capable of reducing the noise exposure to below the noise-rating limit (below 85 dBA).
- Combined risks: If working with ototoxic chemicals or vibration, the HPDs must reduce exposure to below the noise action level (below 82 dBA).
- Selection criteria: When choosing protection, the employer must consider comfort, the physical effort of the work, and compatibility with other safety gear (like hard hats or goggles).
4. The hierarchy of control
South African law emphasizes that hearing protection is the last resort, not the first solution.
- Eliminate: The employer must first try to eliminate the noise source.
- Mitigate: If elimination is impossible, they must use engineering controls (like silencers or enclosures) or administrative controls (limiting the time spent in the noise).
- Protect: Only if these measures fail to reduce noise below the limits must HPDs.
5. Important tip:
Be aware of the 'combined risk'. The 2024 Regulations place a heavy emphasis on ototoxic chemical agents (chemicals that can cause hearing loss even below 85 dB). If your staff works with solvents, heavy metals, or asphyxiants and noise levels are around 82 dB, you are legally required to treat that area as a full noise zone and enforce hearing protection.
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