⏱️ Estimated reading time: 13 min
Key Takeaways
A hearing protection zone is an area of a workplace where everyone must wear hearing protection, because employees are likely to be exposed at or above 85 dB(A) daily or 137 dB(C) peak. Under the Control of Noise at Work Regulations 2005, the employer must mark it with signs and restrict access where practicable.
When employees are likely to reach the upper exposure action value, which is a daily or weekly personal exposure of 85 dB(A) or a peak sound pressure of 137 dB(C). From 80 dB(A), protection must be offered, but its use is only enforced from 85 dB(A).
The blue circle with a white head wearing ear defenders is the ISO 7010 M003 “wear ear protection” sign. Blue circles are mandatory signs, so it means hearing protection must be worn beyond that point, not simply that noise is present.
Yes. Regulation 3(2) extends the employer’s duties, so far as is reasonably practicable, to other people at work, and site inductions usually make protection a condition of entry for contractors, agency staff and visitors alike.
Yes. A zone follows the noise source, so it can be permanent or temporary, fixed or mobile, such as the area around a cut-off saw on site or a press during a production run, marked with portable signs while the noise lasts.
No. The zone tells you protection is required, not how much. Protection is chosen by the noise level, aiming for 70 to 80 dB(A) at the ear, so a 24 dB plug suits some zones and not others.
A hearing protection zone is the part of a workplace where hearing protection stops being optional. UK law requires one wherever employees are likely to be exposed at or above 85 dB(A) over a working day, or to peaks of 137 dB(C), and every entrance has to carry the blue “wear ear protection” sign.
The question we hear most comes from the other side of the sign. “Do I need ear protection if I’m only walking through?” The rule is about entry, not time spent, so the answer is yes, and the plugs go in before you cross the line. HSE’s Labour Force Survey figures put the number of workers with work-related hearing problems at around 15,000 (2022/23 to 2024/25).
At Bollsen, we make reusable hearing protection trusted by 1,000,000+ people, from sleep and music plugs to earplugs for work. Our workplace hub on earplugs for work covers noise levels, UK rules and fit for every trade.
What is a hearing protection zone?
A hearing protection zone is an area an employer designates under Regulation 7(3) of the Control of Noise at Work Regulations 2005, because employees inside are likely to be exposed at or above the upper exposure action value. So far as is reasonably practicable, no employee enters it without wearing personal hearing protectors.
Regulation 7(3) sets three duties. The area must be designated as a zone, demarcated and identified by the specified sign, and access restricted where that is practicable and the risk justifies it.
Zones can be permanent or temporary, fixed or mobile, because the duty follows the noise rather than the floor plan. They do not replace noise control at source; they mark what is left.
When does a workplace legally need a hearing protection zone?
A workplace needs a hearing protection zone wherever employees are likely to reach a daily or weekly personal exposure of 85 dB(A) or a peak sound pressure of 137 dB(C). “Likely” means the employer acts on the noise risk assessment, not on a bad-day reading.
UK law sets three levels, and the zone sits on the middle one.
- 80 dB(A) daily or weekly, or 135 dB(C) peak (lower exposure action value). Protection must be offered.
- 85 dB(A) or 137 dB(C) (upper exposure action value). Protection must be worn, and zones designated and signed.
- 87 dB(A) or 140 dB(C) (exposure limit value). The level at the ear, allowing for protection, must never go above it.
So the noise level at which the law says you must wear ear protection is 85 dB(A). Our explainer on the Control of Noise at Work Regulations 2005 shows how daily exposure is calculated and where each action value comes from.
Is your area over 85? HSE’s rough prompt is that if people have to raise their voices to talk to someone about 2 m away for part of the day, the noise needs assessing. Power tools are a common trigger, with angle grinders and circular saws often running at 95–100 dB(A). Our guide on how loud are power tools (decibel chart) lists typical decibel levels tool by tool.
What does the hearing protection zone sign look like?
The hearing protection zone sign is the ISO 7010 M003 “wear ear protection” mandatory sign, a blue circle with a white pictogram of a head wearing ear defenders. In the UK it is used under BS EN ISO 7010 and the Health and Safety (Safety Signs and Signals) Regulations 1996.
Most signs add a white-on-blue text panel such as “Ear protection must be worn” or “Hearing protection zone”. HSE’s guidance on safety signs sets out the colour code.
| Shape and colour | Type of sign | What it tells you | Example |
|---|---|---|---|
| Blue circle, white pictogram | Mandatory | You must do this | M003 wear ear protection |
| Yellow triangle, black border | Warning | A hazard is present | Forklift trucks operating |
| Red circle with diagonal bar | Prohibition | You must not do this | No smoking |
| Green rectangle | Safe condition | Where to go for safety | Fire exit, first aid |
A yellow triangle near loud machinery only warns. The blue circle is an instruction, and at a hearing protection zone it is the sign that counts.
Where should hearing protection zone signs go?
Hearing protection zone signs go at every entrance to the zone, at eye level where people approach, and at points inside where someone could miss the boundary, such as a second doorway or the far end of a long bay. Floor markings, barriers or chains show exactly where the zone starts.
On a production line, the zone often covers the presses, cutters or packing machines rather than the whole hall, so factory workers need to see the boundary clearly from the walkways. Our guide to earplugs for factory workers looks at typical line noise and the protection that suits each station.
Temporary zones need portable signs. A cut-off saw on site or a breaker in a basement creates a zone for as long as it runs, so the signs go up before the tool starts and come down when it stops. Our advice on earplugs for construction workers matches protection to each trade’s noise levels.
How do you set up a hearing protection zone, step by step?
Setting up a hearing protection zone starts with the noise risk assessment and ends with a review date. These steps cover the zone itself; an employer’s hearing protection duties go wider.
- Assess. Use the noise risk assessment to find where exposure is likely to reach 85 dB(A) or 137 dB(C) peak.
- Reduce. Cut noise at source first with quieter equipment, enclosures or screens, then measure again.
- Designate and record. Draw the boundary on a site plan and note it in the assessment.
- Mark and sign. Put the M003 sign at every entrance, add floor markings or barriers, and keep portable signs for mobile tools.
- Restrict access. Keep out anyone who does not need to be there, and keep time inside as short as the work allows.
- Stock the entrance. Have suitable protectors at the boundary, selected after consulting employees or their representatives, as Regulation 7(4) requires.
- Train and supervise. Explain the zone at induction, contractors and visitors included, and check that protection is worn properly.
- Review. Look again after any change in machinery, layout or shift pattern.
Zones are one part of a longer legal list. Our guide to employer hearing protection duties walks through each regulation in order, from the risk assessment to health surveillance and training.
Who has to wear hearing protection inside the zone?
Everyone who enters a hearing protection zone should wear protection, including employees, managers and supervisors, contractors, agency staff and visitors. HSE says managers should wear protection at all times in zones.
Employees carry their own duty. Under Regulation 8(2), they must make full and proper use of the protectors provided and report any defect as soon as practicable. We cover the employee side in more detail in can my employer make me wear earplugs.
Contractors and visitors are covered too. Regulation 3(2) extends the employer’s duties, so far as is reasonably practicable, to any other person at work who could be affected, and self-employed people carry the duties for themselves under Regulation 3(3). In practice, the site induction makes protection a condition of entry.
And the person only walking through? HSE guidance says only people who need to be in a zone should enter, and not for longer than needed. If you have to pass through, the protection goes in before the line. Whole-shift wearers often ask whether it is safe to wear earplugs all day at work, which comes down mainly to comfort and hygiene.
Is any hearing protector good enough inside the zone?
No. A hearing protection zone tells people that protection is required, not how much, because protection is chosen by level, aiming for 70 to 80 dB(A) at the ear. A 24 dB plug is right for some zones and wrong for others.
HSE’s hearing protection guidance suggests SNR 20 or less for 85–90 dB(A), SNR 20–30 for 90–95 dB(A), SNR 25–35 for 95–100 dB(A) and SNR 30 or more for 100–105 dB(A). Below 70 dB(A) at the ear counts as over-protection, which can leave people isolated and tempted to take their protection out. The bands are not valid for strong low-frequency noise, such as press shops.
Matching the rating to each zone is a question of how much hearing protection a worker needs. Our guide on how much hearing protection do I need works through HSE’s bands with examples, including when the loudest zones call for plugs under ear defenders.
What should be waiting at the zone entrance?
The zone entrance should have suitable protectors within reach, so nobody crosses the line without them. Many sites keep a dispenser of disposable foam plugs for visitors and issue reusable plugs to regular staff, sometimes banded or corded designs that hang round the neck between uses.
Each format trades off hygiene, fit and cost per shift differently. Our comparison of reusable vs foam vs banded earplugs for work sets the three side by side for site managers choosing what to stock.
For staff who go in and out all day, a reusable plug kept in a pocket case is quickest. Our WorkPRO earplugs are rated SNR 24 dB (H 24, M 21, L 19) to EN 352-2, made of reusable hypoallergenic silicone in high-visibility yellow, and low-profile enough to sit under ear defenders. They are passive, so they lower everything, alarms included, and a loud warning stays audible because it is loud, not because a filter passes it through.
For steady zone noise around 90–95 dB(A), where HSE suggests SNR 20–30, our WorkPRO earplugs (SNR 24 dB, £29.95) are German-tested, independently certified 24 dB and come with a 40-day money-back guarantee. Check your zone’s level against the bands first, because quieter zones may suit a lower rating.
So, when must a hearing protection zone be signed?
As soon as employees are likely to reach 85 dB(A) or 137 dB(C) peak, the area must be designated, the M003 sign goes up at every entrance and access is limited. Nobody, from the site manager to a visiting engineer, walks in without protection that suits the level.
If you notice ringing or muffled hearing after a shift, mention it to your occupational health team or GP, and ask whether workplace hearing tests are part of your employer’s health surveillance. Then check that the protection at the entrance matches the noise beyond it.
His connection to hearing protection stems from personal experience with sound sensitivity during live events and work in noisy environments, an issue that made him more aware of the long-term risks of unmanaged noise exposure. Today, as both a communicator and a user of BOLLSEN products, he is passionate about raising awareness around the importance of proactive hearing care.
At BOLLSEN, he develops data-driven marketing campaigns, writes SEO-focused articles, and manages communication channels that connect customers with practical knowledge about hearing protection. His work ensures that BOLLSEN’s message—prioritizing health, performance, and sustainability reaches a global audience in an engaging and trustworthy way.
Passionate about writing since childhood, Timotej combines creativity with a strong analytical approach, continuously testing new ideas in digital marketing, performance advertising, and social media. He believes in learning through innovation and collaboration, balancing leadership with openness to new perspectives.
Beyond his professional role, Timotej is committed to a healthy lifestyle and finds inspiration in fitness, sports, and quality time with friends. His personal passion for well-being aligns with BOLLSEN’s core values, making his work not only a career but also a cause he deeply believes in.