Noise at Work Regulations: Action Levels, Hearing Protection & Tool Selection

Summary

Noise-induced hearing loss (NIHL) is one of the most prevalent occupational diseases in UK construction. It is also entirely preventable. Unlike many other workplace illnesses, hearing damage is irreversible — once hair cells in the cochlea are damaged by noise, they do not recover. The damage accumulates over years, often symptomlessly, until significant hearing loss becomes apparent.

For tradespeople, the risk is real. Angle grinders, disc cutters, reciprocating saws, nail guns, compressors, and generators all produce noise levels well above the 85 dB(A) action level. A brief session cutting concrete with an angle grinder (typically 100–105 dB(A)) can produce more noise dose than an entire day of lighter work. Cumulative exposure over a working career, without adequate protection, leads to permanent hearing damage.

The Control of Noise at Work Regulations 2005 place duties on employers (and self-employed people in respect of themselves) to assess noise exposure, eliminate or reduce noise at source where possible, provide hearing protection where residual noise exceeds the action levels, and establish hearing protection zones. Trade-specific sectors — including construction — have specific guidance from HSE.

Key Facts

• Lower Exposure Action Value (LEAV): 80 dB(A) daily or weekly average; hearing protection must be made available and provided on request; peak pressure limit 112 Pa (135 dB(C))
• Upper Exposure Action Value (UEAV): 85 dB(A) daily or weekly average; hearing protection must be worn; noise reduction programme required; peak pressure limit 140 Pa (137 dB(C))
• Exposure Limit Value (ELV): 87 dB(A) at the ear — absolute maximum; 200 Pa (140 dB(C)) peak; cannot be exceeded even with hearing protection
• Noise assessment: Required where employees (or self-employed) may be exposed at or above the LEAV; can use representative tool noise data with HSE calculators rather than full measurement on site
• Daily Personal Noise Exposure (LEP,d): The A-weighted sound pressure level calculated as an average over the working day — the key figure for comparison with action levels
• Doubling rule: Every 3 dB increase in sound level doubles the noise energy; a tool producing 94 dB produces 8× the energy of one at 85 dB (three 3-dB doublings)
• Time weighting: Halving the exposure time reduces the dose by 3 dB — working for 2 hours at 94 dB = same dose as 1 hour at 97 dB
• Attenuation rating (SNR): SNR (Single Number Rating) on hearing protection packaging; subtract from ambient noise to get approximate noise at ear; use with assumed protection value (APV) method for accuracy
• Real-world protection: Hearing protectors typically provide 6–12 dB less protection than their stated SNR in real conditions (mis-fit, talking, removal); always allow a safety margin
• HSE Noise at Work calculator: Free online tool from HSE for estimating daily noise exposure from common construction tools — use daily, no specialist equipment needed for initial assessment
• Audiometric surveillance: Employees regularly exposed above the UEAV should have regular hearing tests; encouraged above LEAV
• Young workers: Workers under 18 are more vulnerable — apply LEAV controls at lower exposure levels

Quick Reference Table — Typical Construction Tool Noise Levels

Detailed Guidance

Understanding the Regulations and Who They Apply To

The Control of Noise at Work Regulations 2005 apply to all employers in Great Britain (Northern Ireland has equivalent legislation). Crucially, self-employed people have the same duties as employers in respect of their own health — a sole trader using loud tools is required to assess their own noise exposure and use appropriate controls, just as if they were an employee.

Domestic clients are not covered by these regulations in the same way as an employer (they are not employing people in a commercial sense), but the tradesperson's duties to protect themselves and any employed workers remain.

The Regulations require employers to:

1. Assess the noise risks (at or above LEAV)
2. Reduce exposure to noise at source (engineering and administrative controls)
3. Provide hearing protection where residual exposure exceeds the LEAV; mandate use at UEAV
4. Demarcate and control access to high-noise areas
5. Provide information, instruction, and training to employees
6. Ensure hearing protection is properly used and maintained
7. Provide health surveillance (audiometric testing) where exposure regularly exceeds the UEAV

Noise Assessment — Practical Approach for Tradespeople

Full noise monitoring (using a Class 2 sound level meter or noise dosimeter, calibrated) is the most accurate method for assessing noise exposure. However, HSE recognises that this is not practical for small businesses on every job.

HSE provides two practical alternatives for small employers and self-employed tradespeople:

1. HSE Noise Exposure Calculator (free online): Input the tools used, their noise levels (from published tool noise data or measurements), and the time spent on each tool. The calculator outputs the estimated daily exposure in dB(A). Tool noise data is available from manufacturer data sheets and from HSE's own table of typical construction tool noise levels.

2. Representative monitoring: Commission a noise measurement on a representative working day — many H&S consultants or UKAS-accredited labs offer this. Results can be applied to similar working patterns without remeasuring each job.

Key inputs for the calculator:

• Tool type and model (or noise emission value from the manual — look for LWA or LpA at operator position)
• Duration of use per day (not just time you are near the tool, but time you are operating it)
• Background noise levels (other trades working nearby)

The noise emission values on tool data sheets (marked with the EN 60745 or EN ISO 4871 standard) are often measured under standardised conditions — actual in-use noise levels may differ. Use HSE's published construction tool noise data as a cross-check.

Hierarchy of Controls for Noise

Hearing protection is the last line of defence, not the first. The hierarchy for noise control:

1. Elimination: Is the task necessary? Can the work be done differently?
2. Substitution: Replace the loud tool with a quieter alternative (see below)
3. Engineering controls: Enclose the noisy process, use damping materials, maintain tools (worn blades create more noise)
4. Administrative controls: Rotate tasks to reduce individual exposure duration; schedule noisy work for short periods with breaks; keep workers away from noise sources when not directly working
5. Hearing protection (PPE): Last resort after other controls are exhausted

Do not jump straight to hearing protection as the only control — the Regulations require that noise is reduced at source first, with hearing protection filling the gap.

Substitution — Choosing Quieter Tools

Some task/tool combinations have significantly quieter alternatives:

• Breaking concrete: Hydraulic or pneumatic breaker vs electric SDS — electric SDS rotary hammers are typically 5–10 dB quieter than pneumatic breakers
• Cutting slabs: Wet saw (with water suppression) vs dry disc cutter — wet cutting reduces both dust and slightly reduces noise; more importantly, cuts time for equivalent cutting volume
• Fixing timber: Nail gun vs screw gun — nail guns produce high peak noise; screw guns are significantly quieter for many applications
• Chasing walls: Chase saw vs SDS chisel — a rotary hammer in chisel mode used carefully may be quieter than a dedicated chasing machine in some circumstances; on-tool extraction fitted to a chaser significantly reduces the overall noise environment by containing the process

Quieter tools are not always available or practical — but considering substitution is a legal requirement before defaulting to hearing protection.

Hearing Protection Types and Selection

Three main types available for construction:

Disposable foam earplugs (SNR 20–37 dB): Cheap, comfortable for long wear, requires correct fitting (roll, insert, hold). Incorrectly fitted earplugs provide significantly less protection than their SNR. Most common cause of over-confidence: assuming earplugs are protecting when they are not seated correctly.

Reusable moulded earplugs (SNR 20–30 dB): Banded earplugs or moulded silicone types. Convenient for intermittent wear (can hang around neck between tasks). Less attenuation than correctly fitted foam plugs.

Earmuffs/defenders (SNR 20–36 dB): Cup-style defenders worn over ears. Easier to fit correctly than earplugs; hygiene is easier to maintain; can be fitted with electronic level-dependent function (allows communication while blocking impulse noise). Bulkier than earplugs; incompatible with safety glasses without check on combined protection.

Level-dependent / electronic earmuffs (SNR 20–35 dB): Allow normal-level speech through but electronically limit peak noise. Ideal for work with intermittent high-noise events (nail guns, pneumatic tools). More expensive but significantly better for communication and situational awareness.

Over-helmet earmuffs: Attach to hard hat — essential for overhead work where standard earmuffs would be displaced. Match the SNR to the same standard as standalone defenders.

Selection guidance:

• Match SNR to the noise level: aim for residual noise at the ear of 70–80 dB (don't over-protect — inability to hear warning sounds is its own hazard)
• At 100 dB ambient: need SNR of 25–30 dB
• At 110 dB ambient: need SNR of 35+ dB (or dual protection: earplugs + earmuffs)
• Check CE mark and EN 352 standard on packaging

Hearing Protection Zones

Where noise regularly exceeds the UEAV, the Regulations require that the area is demarcated as a Hearing Protection Zone — signage indicating that hearing protection must be worn. On construction sites, this is typically enforced by the principal contractor. For smaller domestic jobs, demarcation is still required if noise exceeds the UEAV (e.g. when using a disc cutter in a room where other trades are working).

Audiometric Surveillance (Hearing Tests)

Where employees are regularly exposed above the UEAV, employers must provide regular audiometric testing. For small firms and sole traders, this is encouraged above LEAV and mandatory above UEAV. Occupational health providers offer hearing tests — many mobile occupational health services visit sites.

Hearing tests establish a baseline and detect early hearing loss. If a worker is showing early decline, this triggers enhanced controls and possible redeployment away from high-noise tasks. It is also important evidence in any future noise-induced hearing loss compensation claim.

Frequently Asked Questions

Do hearing protection requirements apply on domestic jobs as well as commercial?

Yes. The Regulations apply to the worker's health regardless of whether the work is commercial or domestic. A self-employed plumber using an angle grinder in a domestic bathroom has the same duty to control their own noise exposure as a large contractor on a commercial site.

How long can I use an angle grinder before I need hearing protection?

At a typical angle grinder noise level of 100–105 dB(A), the daily exposure limit (85 dB(A) LEP,d) is reached in approximately 2–5 minutes of continuous use. In practice, angle grinder use is not often continuous, but cumulative use throughout a day will exceed the limit quickly. Wear hearing protection from the first use — there is no meaningful "grace period."

What if I wear earplugs but can still hear the noise clearly?

If you can clearly hear the tool noise through earplugs, either the earplugs are not correctly inserted (most common — roll, pull the ear up and back, insert deep, hold until expanded) or the noise level is very high and the earplugs' SNR is insufficient. Check fitting and, for very loud tools, consider upgrading to earmuffs or dual protection.

Can I be prosecuted for noise at work violations?

Yes. HSE can issue Improvement Notices and Prohibition Notices for breaches of the Noise at Work Regulations. Persistent failure to comply can result in prosecution. Additionally, employees and former employees can make compensation claims for noise-induced hearing loss through the civil courts — claims can be substantial and are increasingly common.

Regulations & Standards

• Control of Noise at Work Regulations 2005 — the primary legislation; defines action levels, employer duties, and hearing protection requirements

• HSE Guidance L108 (Controlling Noise at Work) — the approved code of practice (ACoP) accompanying the Regulations

• EN ISO 4871 (Machinery noise declarations) — standard for tool noise emission values

• EN 352 (Hearing protectors) — European standard for hearing protector performance

• BS EN 458 (Hearing protectors — Recommendations for selection) — guidance on matching hearing protector SNR to noise level

• HSE Noise at Work — official HSE guidance, action levels, noise exposure calculator

• HSE Noise Exposure Calculator — free tool for estimating daily noise dose

• CITB Construction Site Noise Guide — practical noise control for construction sites

• HSG138 (Sound Solutions for the Construction Industry) — trade-specific noise reduction guidance

• Hearing Link UK — occupational hearing loss information and support

• dust control — dust control (often same tools create both dust and noise risk)

• site setup — small site welfare and H&S setup

• working at height — working at height controls

• confined spaces — noise in confined spaces is amplified