If your workforce has hearing protection duties under the Control of Noise at Work Regulations 2005, you'll be familiar with audiometry — the annual or periodic hearing test that forms part of your health surveillance programme. What's changed recently is how those results are reported, and it's worth understanding why.
Why your audiometry results now tell you more
Historically, an audiometry result came back as a single category, and that category was treated as a proxy for "is this person's hearing okay?" It was never really designed to answer that question on its own — it was built to group results and flag when action was needed, not to diagnose a specific condition.<br/>The gap that leaves is real. An employee can return a good category and still have early, genuine noise-induced hearing loss (NIHL) building underneath it. Equally, a poorer category doesn't always mean noise is the cause — a cold, an ear infection, or a build-up of wax can affect a result just as much as years of exposure. Current HSE guidance addresses this by asking occupational health providers to screen specifically for NIHL, separately from the general category, so the two questions — "how's this hearing test look overall" and "is there a pattern consistent with noise damage" — get answered independently rather than being collapsed into one number.
What the categories broadly mean
• Category 1 — hearing within the normal range for the test. No action needed beyond your usual noise controls.<br/>• Category 2 — a mild change worth keeping an eye on. Usually a prompt to check hearing protection is being worn and used correctly.<br/>• Category 3 — a more significant change, or an early indication of possible noise-induced loss, that needs a closer clinical look before anything is confirmed.<br/>• Category 4 — a rapid or substantial change that needs prompt clinical attention, and usually a review of whether current controls are actually working.<br/>The exact criteria behind each category, and the review process a result goes through before it's confirmed, is clinical detail your occupational health provider manages on your behalf — as it should be, since getting it wrong in either direction (missing a real case, or over-flagging a normal one) has real consequences for the employee and for you.
Why NIHL gets treated differently
Noise-induced hearing loss has a distinctive pattern when it shows up in a hearing test, one that's genuinely different from the general decline most people experience with age. That distinctiveness is what makes it identifiable — but telling a true early case apart from a temporary dip (noise exposure the day before a test can temporarily affect results) or an unrelated medical cause takes clinical judgement, not just a threshold on a chart. That's why a single result isn't usually treated as the final word: a suspected pattern gets confirmed clinically before it's acted on, rather than triggering an immediate alarm off one test.
The reason this matters for you as an employer is straightforward: noise-induced hearing loss doesn't recover. Once it's happened, it's permanent. The entire point of screening for it specifically, rather than relying on a general category, is catching it early enough that you can act on your controls before more damage occurs — not after.
What happens if a result needs your attention
When a result does flag something, you'll hear about it clearly, with a specific next step — not just a category on a spreadsheet. Depending on what's been found, that can range from a straightforward check that hearing protection is being worn and maintained correctly, through to a referral for a closer clinical review before anything is confirmed one way or the other. Your occupational health provider manages that process; your part is acting on the advice once it reaches you.
Your responsibilities as an employer
Regardless of what an individual result shows, the Control of Noise at Work Regulations 2005 put ongoing duties on you as the employer: assessing noise risk, providing suitable hearing protection and training, maintaining hearing protection zones where needed, and providing health surveillance where your risk assessment identifies exposure above the action levels. Audiometry results are one input into that picture — a good set of category 1 results across your workforce is a sign your controls are working, not a reason to stop monitoring them.<br/> <br/>How OccuMed manages this for you
Every audiometry result we return is reviewed by a qualified clinician, not just generated and handed back as a number. Where a result needs a closer look, we manage that review and keep both you and the employee clearly informed at each stage, so you're never left interpreting an audiogram yourself or guessing at what a category means for your business.
If you'd like to talk through setting up or reviewing a health surveillance programme for your workforce, get in touch — call 01922 254020, email enquiries@occumed.co.uk, or read more about our Health Surveillance service.