Protecting Your Ears Isn’t Optional
If you work on a noisy jobsite, hearing protection isn’t just a recommendation — it’s a legal requirement. Long-term exposure to noise above 85 decibels (dB) can lead to irreversible hearing damage. That’s where Class 5 hearing protection comes in. But what does Class 5 actually mean? And how do you know if you're wearing the right earmuffs or earplugs?
What Is the Hearing Protection Classification System?
In Australia, hearing protection devices are rated according to AS/NZS 1270:2002. This standard classifies earmuffs and earplugs into five classes based on how much noise they reduce — known as the SLC80 rating (Sound Level Conversion).
Classes Explained:
- Class 1: Low-level protection (up to 90 dB)
- Class 2: Moderate protection (up to 95 dB)
- Class 3: Medium protection (up to 100 dB)
- Class 4: High protection (up to 105 dB)
- Class 5: Maximum protection (105+ dB)
What Makes Class 5 Hearing Protection Different?
Class 5 is the highest level of hearing protection available under AS/NZS standards. These earmuffs or earplugs provide an SLC80 rating of 26 dB or more, which means they are suitable for use in environments where noise levels exceed 110 dB — the equivalent of a chainsaw or jackhammer running at full power.
Key Features of Class 5 Protection:
- Ideal for high-noise industries like mining, demolition, construction, and heavy manufacturing
- Often includes thick cushioned earmuffs or deeply-inserted earplugs
- May be combined with communication systems or hard hat-mounted versions
When Should You Use Class 5 Hearing Protection?
If you’re using tools like angle grinders, jackhammers, concrete cutters, or working in confined spaces with reverberating machinery, Class 5 protection is essential. You should also conduct a site noise assessment to determine actual exposure levels and choose PPE accordingly.
Common Myths About Hearing PPE
- “Any earmuffs will do.” – False. Not all protect against high decibel levels.
- “I only need them for loud tasks.” – False. Damage can occur from long-term exposure, even at moderate levels.
- “Double protection (earmuffs + earplugs) doubles safety.” – Partly true. It adds protection but doesn’t mean you can ignore safe exposure limits.
Shop Class 5 Hearing Protection at Safety Direct
At Safety Direct, we stock a full range of AS/NZS 1270 Class 5 earmuffs and earplugs from Australia’s most trusted PPE brands. Whether you need helmet-mounted earmuffs, disposable earplugs, or electronic hearing solutions, we’ve got the protection your site demands.