Occupational Hearing Test

What Is an Occupational Hearing Test?

An occupational hearing test — also known as workplace audiometry or audiometric surveillance — is a hearing assessment carried out specifically for employees who are exposed to high levels of noise as part of their work. Its purpose is twofold: to establish a baseline record of an employee`s hearing when they first enter a noisy role, and to monitor that hearing over time so that any noise-related damage can be detected early — before it becomes severe, symptomatic, or irreversible.

In the United Kingdom, occupational hearing testing is not optional for many employers. It is a legal requirement under the Control of Noise at Work Regulations 2005, which implement the European Physical Agents (Noise) Directive into UK law. These regulations apply to all workplaces in Great Britain where employees are exposed to noise levels that could damage their hearing, and they place clear, enforceable duties on employers to assess risk, reduce exposure, provide hearing protection, and offer health surveillance in the form of regular audiometric testing.

Noise-induced hearing loss (NIHL) remains one of the most common occupational diseases in the UK. The Health and Safety Executive (HSE) estimates that approximately 17,000 workers in the UK suffer from hearing problems they believe were caused or made worse by their work. Crucially, NIHL is entirely preventable — and regular occupational hearing tests are one of the most effective tools for catching damage before it progresses. If you work in a noisy environment, understanding your rights and your employer`s obligations is essential for protecting your hearing for life.

The Legal Framework — Control of Noise at Work Regulations 2005

The legal backbone of occupational hearing protection in the UK is the Control of Noise at Work Regulations 2005, enforced by the HSE. These regulations define three critical noise exposure thresholds — known as exposure action values — that trigger specific duties for employers:

Lower Exposure Action Value — 80 dB(A)

When an employee`s daily or weekly average noise exposure reaches 80 dB(A), or peak sound pressure reaches 135 dB(C), the employer must:

• Carry out a noise risk assessment to identify which employees are at risk
• Make hearing protection available to employees who request it
• Provide information and training about the risks of noise exposure, the steps being taken to reduce risk, and how to use hearing protection properly
• Offer health surveillance (audiometric testing) where there is a risk to health — the HSE strongly recommends this even at the lower action value

Upper Exposure Action Value — 85 dB(A)

When daily or weekly noise exposure reaches 85 dB(A), or peak sound pressure reaches 137 dB(C), employer duties become more stringent:

• Health surveillance (audiometric testing) becomes mandatory — the employer must provide regular hearing tests for all exposed employees
• Hearing protection must be provided and its use enforced — it is no longer optional
• The employer must implement a programme of measures to reduce noise exposure, such as engineering controls, job rotation, or workplace redesign
• Hearing protection zones must be demarcated and signed

Exposure Limit Value — 87 dB(A)

The absolute exposure limit of 87 dB(A) daily average (or 140 dB(C) peak) must never be exceeded, even when hearing protection is taken into account. This is the level at which the combined effect of noise exposure and the attenuation provided by hearing protection is assessed. If this limit is breached, the employer must take immediate action to bring exposure below the limit.

To put these figures in perspective: a normal conversation is around 60 dB, a busy road is about 80 dB, a pneumatic drill at close range is around 100 dB, and a rock concert can reach 110–120 dB. Exposure to noise at 85 dB for an eight-hour shift poses a significant risk of permanent hearing damage over time.

Who Needs Occupational Hearing Tests?

Occupational hearing tests are required for any worker whose noise exposure meets or exceeds the thresholds described above. In practice, this includes employees across a wide range of industries and job roles:

• Construction workers — exposed to power tools, concrete cutters, pneumatic drills, and site noise
• Manufacturing and factory workers — operating presses, stamping machines, conveyors, and assembly lines
• Mining and quarrying workers — exposed to drilling, blasting, and heavy earth-moving equipment
• Military and emergency services personnel — exposed to weapons fire, explosions, sirens, and helicopter noise
• Musicians, DJs, sound engineers, and live event crew — see our dedicated musicians` hearing test page for more detail
• Airport and aviation workers — exposed to jet engines, ground handling equipment, and runway noise
• Farmers and agricultural workers — exposed to tractors, chainsaws, grain dryers, and livestock handling equipment
• Woodworkers and carpenters — using saws, planers, routers, and sanders
• Nightclub and bar staff — exposed to sustained amplified music
• Call centre workers — with prolonged headset use at high volumes (an emerging area of concern)

The HSE emphasises that any workplace where employees have to raise their voices to be heard by someone standing two metres away is likely to have noise levels approaching or exceeding the lower exposure action value. If you are unsure whether your workplace is noisy enough to require audiometric testing, your employer should have carried out a noise risk assessment — you have the right to ask to see it.

How Occupational Audiometric Testing Works

Occupational hearing tests are typically carried out by a trained audiometrician, occupational health technician, or occupational health nurse, following the procedures set out in HSE guidance document L108 (Controlling Noise at Work) and the British Society of Audiology (BSA) recommended procedures for pure tone audiometry. Testing can take place on-site at the workplace using a mobile audiometric testing unit — a soundproofed booth mounted inside a vehicle — or at an occupational health clinic.

Pre-test questionnaire

Before the audiogram, you will complete a short questionnaire covering your noise exposure history (current and past jobs), use of hearing protection, any hearing symptoms you have noticed (such as difficulty hearing conversations, tinnitus, or a feeling of muffled hearing after shifts), and relevant medical history including ear infections, ear surgery, or ototoxic medication use.

Otoscopic examination

The technician will examine your ear canals and eardrums using an otoscope, checking for conditions that could affect the test results — such as ear wax build-up, infection, or eardrum perforation. If significant wax is found, ear wax removal may be recommended before testing.

Pure tone audiometry

You will sit inside a soundproofed booth or quiet room and wear audiometric headphones. The audiometry procedure is the same as a clinical hearing test: you listen for a series of tones at different frequencies (typically 500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz, 6000 Hz, and 8000 Hz) and press a button each time you hear a sound. The audiometer records the quietest level (threshold) at which you can hear each frequency. The result is an audiogram — a graph showing your hearing thresholds at each frequency for each ear. The HSE recommends that occupational audiometry should ideally be performed at least 16 hours after the last noise exposure, to avoid the masking effects of temporary threshold shift (TTS) — a short-term dulling of hearing that occurs after noise exposure and resolves with rest.

Baseline and periodic testing

A baseline audiogram is recorded when you first enter a noisy role (or as soon as possible after the health surveillance programme begins). All subsequent audiograms are compared against this baseline to detect any threshold shift — a deterioration in hearing thresholds that may indicate the onset of noise-induced hearing loss. The HSE recommends:

• Annual testing for the first two years of exposure and for anyone showing early signs of hearing change
• Testing at least every three years thereafter for employees at lower risk, provided no significant changes have been detected
• Immediate re-testing if an employee reports new hearing symptoms or if a significant threshold shift is identified

Interpreting Results and HSE Categorisation

Occupational audiometry results are classified using a standardised system based on HSE guidance. The HSE categorisation system places each audiogram into one of several categories based on the pattern and severity of hearing loss:

• Category 1 (Acceptable hearing): Hearing thresholds are within normal limits. No action required beyond continued monitoring and hearing protection use.
• Category 2 (Mild hearing impairment): Some hearing loss is present, but it may be consistent with normal ageing (presbycusis) rather than noise damage. The employee should be counselled on the importance of hearing protection and monitored at the recommended interval.
• Category 3 (Poor hearing): Hearing loss is present and may include a noise-related component. The employee should be referred for clinical audiology assessment, their noise exposure should be reviewed, and hearing protection compliance should be reinforced.
• Category 4 (Rapid decline): A significant worsening of hearing thresholds compared to the baseline audiogram has been detected. This is the most concerning category and triggers urgent referral for clinical assessment, a thorough review of the employee`s noise exposure and hearing protection use, and possible workplace adjustments.

It is important to understand that occupational audiometry is a screening tool — it identifies employees who may be developing hearing loss, but it does not provide a full diagnosis. Employees whose results fall into categories 3 or 4 should be referred to a clinical audiologist for a comprehensive diagnostic hearing assessment, which may include bone conduction testing, tympanometry, and speech-in-noise testing.

Employer Responsibilities and Employee Rights

The Control of Noise at Work Regulations 2005 place clear legal duties on employers — and corresponding rights on employees. Understanding both sides is important for ensuring that hearing protection programmes work in practice.

Employer duties

• Noise risk assessment: Employers must assess the noise levels in their workplace, identify who is at risk, and determine what measures are needed. This should be carried out by a competent person (such as an occupational hygienist or acoustics consultant) using calibrated noise monitoring equipment.
• Noise reduction: Where reasonably practicable, employers must reduce noise exposure through engineering controls — such as machine enclosures, vibration damping, silencers, and job rotation — before relying on personal hearing protection.
• Hearing protection: Suitable hearing protection (ear plugs, ear muffs, or custom-moulded protectors) must be provided free of charge. At or above 85 dB(A), wearing protection must be enforced, not merely offered.
• Health surveillance: Audiometric testing must be provided and maintained as a regular programme. Results must be kept in the employee`s health record for at least 40 years (as recommended by HSE guidance), and employees must be given access to their own records on request.
• Training and information: Employees must be informed about the risks, trained in hearing protection use, and told how to report problems. See our guide to protecting your hearing for practical advice.

Employee rights

• You have the right to receive regular hearing tests at your employer`s expense if you are exposed to noise at or above the upper exposure action value
• You have the right to see your audiometry results and receive an explanation of what they mean
• You have the right to report hearing concerns to your employer or trade union representative without fear of reprisal
• You have the right to suitable hearing protection provided free of charge
• If you believe your employer is not complying with the regulations, you can contact the HSE or your local authority`s environmental health team

Hearing Conservation Programmes

Best practice — and the approach recommended by the HSE, the BSA, and the Faculty of Occupational Medicine — is to embed occupational hearing testing within a broader hearing conservation programme (HCP). An effective HCP is more than just a series of audiograms; it is an integrated system designed to prevent noise-induced hearing loss across the organisation. The key components include:

• Noise surveys and risk assessments — regular measurement and mapping of noise levels across the workplace, identifying high-risk areas and tasks
• Engineering and administrative controls — investing in quieter machinery, enclosures, barriers, and scheduling to reduce exposure at source
• Hearing protection selection and fitting — choosing protectors matched to the noise environment and ensuring each employee is individually fitted (generic one-size-fits-all ear plugs often provide inadequate attenuation)
• Audiometric surveillance programme — baseline and periodic hearing tests with trend analysis, categorisation, and referral pathways
• Training and education — regular sessions on noise risks, correct use and care of hearing protection, early signs of hearing damage, and the importance of reporting symptoms
• Record keeping and review — maintaining audiometric records, tracking trends across the workforce, and using the data to refine the programme over time

Employers who invest in comprehensive hearing conservation programmes not only protect their workforce but also reduce their legal and financial exposure. Noise-induced hearing loss compensation claims remain one of the most common types of occupational disease claim in the UK, and demonstrating a robust, well-documented HCP is a powerful defence. The Institute of Occupational Safety and Health (IOSH) and the British Occupational Hygiene Society (BOHS) both publish guidance on establishing effective hearing conservation programmes.

What Happens If Hearing Loss Is Detected?

If your occupational hearing test reveals a significant threshold shift or a pattern consistent with noise-induced hearing loss, several steps should follow:

• Clinical referral: You should be referred to a clinical audiologist or your GP for a comprehensive diagnostic hearing assessment, including bone conduction testing to determine the type of hearing loss
• Exposure review: Your employer must review your current noise exposure, the effectiveness of your hearing protection, and whether additional controls are needed
• Workplace adjustments: This may include redeployment to a quieter role, improved hearing protection, or changes to your working patterns
• Ongoing monitoring: More frequent audiometric testing may be recommended — typically annually or more often — to track whether the hearing loss is stable or progressing
• Support and rehabilitation: If hearing loss is confirmed, you may benefit from hearing aid fitting, a tinnitus assessment (if tinnitus is present), or referral to NHS hearing services

It is important to know that if you develop hearing loss as a result of workplace noise and your employer failed to provide adequate protection, you may be entitled to compensation. Noise-induced hearing loss claims are typically made through personal injury solicitors, and your occupational audiometry records are key evidence. The RNID provides information and support for people affected by workplace hearing loss.

Booking an Occupational or Personal Hearing Test

If your employer provides occupational hearing tests, speak to your occupational health department, HR team, or line manager to ensure you are included in the programme. If you work in a noisy environment and have not been offered testing, raise this with your employer or trade union representative — they may be in breach of their legal duty.

If you have concerns about your hearing outside of the workplace — or if you want a full diagnostic assessment beyond what occupational screening provides — you can book a comprehensive hearing test with a clinical audiologist. Providers such as Boots Hearingcare, Specsavers Audiology, and Hidden Hearing offer full diagnostic audiometry including bone conduction testing and speech-in-noise assessment. Use our search tool to find audiologists near you, compare availability, and book an appointment online. Protecting your hearing starts with knowing where you stand — and an occupational hearing test is the first line of defence.