A guide for operations directors, H&S managers and production managers in UK manufacturing
The noise problem in UK manufacturing
Noise-induced hearing loss is irreversible. Unlike most occupational health conditions, there is no treatment and no recovery. Once the hair cells of the inner ear are damaged by excessive noise exposure, the damage is permanent. The worker carries it for life.
According to HSE data averaged across 2022/23–2024/25, an estimated 15,000 workers per year develop hearing problems caused or made worse by their work. Manufacturing has the highest rate of noise-induced hearing loss of any UK industry sector — 4.1 cases per 100,000 employees, more than twice the rate of construction. Across the working population, approximately 170,000 individuals are living with hearing loss or tinnitus attributable to occupational noise exposure.
These figures represent the known and diagnosed population. The actual number is higher: many workers are unaware that their hearing loss is occupationally caused, or are unaware that compensation is available. The IIDB scheme, which captures formal claims, records only cases where hearing loss exceeds 50 dB in both ears — a high threshold that excludes the much larger population with moderate, debilitating but sub-threshold loss.
What the regulations require
The Control of Noise at Work Regulations 2005 apply to all manufacturing employers in Great Britain and set a clear hierarchy of duties based on daily or weekly noise exposure levels (LEP,d).
- 80 dB(A) — Lower Exposure Action Value. At or above this level, employers must carry out a noise risk assessment, provide information and training to workers, and make hearing protection available on request. Many assembly and production environments exceed this threshold during normal operation.
- 85 dB(A) — Upper Exposure Action Value. At or above this level, employers must take action to reduce noise exposure at source so far as is reasonably practicable, designate hearing protection zones with mandatory PPE, and provide health surveillance (audiometric testing) for all workers regularly exposed at or above this level.
- 87 dB(A) — Exposure Limit Value. The absolute ceiling. Workers must not be exposed above this level, accounting for any attenuation provided by hearing protection. Exceeding the ELV is a criminal breach of the Regulations.
The hierarchy of control under the Regulations — as with all health and safety law — requires employers to address noise at source before resorting to PPE. Hearing protection is the last line of defence, not the first. Where engineering controls or acoustic workstation enclosures can reduce operator exposure to below the upper action value, the Regulations require that approach to be taken.
The real cost of noise in your facility
The financial consequences of unmanaged noise exposure extend well beyond the cost of hearing protection. The full cost picture includes:
Compensation liability
Noise-induced hearing loss is one of the most frequently litigated occupational disease claims in the UK. Compensation awards under the Judicial College Guidelines range from £7,100 for mild hearing loss or tinnitus to £140,000 for total deafness, with the majority of manufacturing claims settling in the £10,000–£45,000 range per claimant.
Unlike accident claims, NIHL claims are not limited to a single incident. A worker exposed to damaging noise levels over several years has a claim that spans that entire period. Solicitors operating on a no-win, no-fee basis have made NIHL claims straightforward to bring — and the three-year limitation period runs from the point of diagnosis, not the point of exposure, meaning claims can arrive decades after the exposure occurred.
Employers’ liability insurance covers most NIHL claims, but insurers price that risk. A facility with documented noise management problems — or a history of NIHL claims — will pay elevated premiums that persist for years.
Productivity loss
Noise affects performance as well as health. Research consistently shows that working in noisy environments reduces concentration, increases error rates and accelerates fatigue — independently of any hearing damage. Specific findings include:
- A 10 dB increase in ambient noise level reduces productivity by approximately 5%
- Workers in environments above 85 dB experience a 60% reduction in the ability to focus, significantly increasing the likelihood of errors and safety incidents
- Noise above comfortable communication thresholds increases the frequency of misunderstanding between operators and supervisors, adding rework and requiring repeat instruction
- Cognitive fatigue from sustained noise exposure compounds across a shift, with performance declining more steeply in the final hours
For precision assembly, inspection or quality-critical tasks, the error-rate consequences of noise exposure are particularly significant. A defect introduced by a fatigued or distracted operator at a noisy workstation does not announce itself — it travels downstream until it is caught in quality control, or until it reaches the customer.
Health surveillance costs
Employers with workers regularly exposed at or above 85 dB(A) are required under the 2005 Regulations to provide audiometric testing. For a facility of 50 production workers, the recurring cost of health surveillance is typically £1,500–£3,000 per year — before accounting for any follow-up occupational health referrals triggered by deteriorating results.
HSE enforcement
Noise is an active HSE enforcement priority. Inspectors visiting manufacturing facilities will measure noise levels, review risk assessments and health surveillance records, and assess whether engineering controls have been implemented where reasonably practicable. Improvement notices requiring noise reduction measures are common; prosecution for persistent or serious breaches carries unlimited fines under the current sentencing guidelines.
Why PPE alone is not enough
Hearing protection — earplugs, earmuffs — is the most widely used noise control measure in UK manufacturing. It is also, in isolation, the weakest.
The reasons are practical rather than theoretical. Hearing protection only protects when it is worn correctly and consistently. Research on real-world PPE compliance in manufacturing environments consistently shows that protection is not worn for part of every shift — during brief tasks, during communication with colleagues, during breaks. Even short periods of unprotected exposure to high noise levels contribute to cumulative hearing damage.
Hearing protection also does nothing to address the productivity and cognitive effects of noise on the people wearing it. An operator in earmuffs at an 88 dB workstation is protected from hearing damage but is still performing in a high-noise cognitive environment. Their ability to communicate, concentrate and detect quality issues remains impaired.
The Control of Noise at Work Regulations 2005 recognise this explicitly. PPE is the last resort in the hierarchy of controls — not because it does not work, but because it depends entirely on consistent human behaviour. Engineering controls at source are the preferred approach.
How acoustic workstations address the problem at source
An acoustic workstation enclosure reduces the noise level experienced by the operator by addressing the problem at the point of exposure — around the operator and their immediate work environment — rather than relying on PPE to manage the residual risk.
Well-designed acoustic enclosures achieve noise reductions of 15–30 dB(A) at the operator position. To put that in context:
- A 10 dB reduction halves the perceived loudness
- A 20 dB reduction brings an 88 dB environment down to 68 dB — from a level requiring mandatory hearing protection to a level well below both action values
- A 25 dB reduction at a 90 dB workstation brings operator exposure to 65 dB — below the threshold at which noise has measurable cognitive effects on performance
The compliance implications are direct. Where an acoustic enclosure brings operator exposure below 80 dB(A), the legal requirement for hearing protection is removed. Where it brings exposure below 85 dB(A), the requirement for hearing protection zones, health surveillance and mandatory PPE is removed. Engineering controls at this level satisfy the “reduce noise exposure at source” duty under Regulation 6 of the 2005 Regulations.
Calculating a realistic payback period
The payback calculation for an acoustic workstation installation involves several cost streams, not all of which are visible in day-to-day operations.
Example: a single operator workstation in an 88 dB assembly environment
- Annual health surveillance cost: £60–£80 per worker — eliminated if exposure falls below 85 dB
- Annual hearing protection cost: approximately £50–£150 per worker for disposable earplugs or earmuff replacement — eliminated if exposure falls below 80 dB
- Productivity uplift from noise reduction: a conservative 3–5% improvement in throughput and error rate for a worker whose noise exposure falls from 88 dB to 65 dB — for a worker generating £150,000 of output per year, that represents £4,500–£7,500 of recoverable value annually
- Compensation liability reduction: difficult to quantify exactly, but eliminating the primary exposure vector removes the employer from the claim entirely. One settled NIHL claim at £20,000 funds a significant acoustic installation programme
- Insurance premium impact: demonstrably reduced noise exposure, supported by post-installation noise measurement records, provides tangible evidence of risk reduction at renewal
Against these savings, an OTTOKIND acoustic workstation enclosure represents a capital investment in a durable, purpose-built system designed for industrial use and a long operational life. The payback period for a single workstation, accounting for the productivity uplift alone, is typically under three years. Including compensation liability and health surveillance savings, the case is stronger still.
The compliance and quality case combined
Acoustic workstations address two problems simultaneously — and that is unusual in capital equipment decisions.
The compliance case is straightforward: reducing operator exposure below the upper action value satisfies the engineering control duty under the 2005 Regulations, removes the requirement for mandatory hearing protection and health surveillance, and provides a documented, defensible response to any HSE inspection or enforcement action.
The operational case is equally strong: a quieter workstation produces a more focused operator, fewer errors, better communication between operators and supervisors, and consistent throughput across a full shift. For precision assembly, inspection, testing or quality-critical tasks, the performance improvement from noise reduction is measurable.
These two returns compound. A facility that installs acoustic workstations does not choose between compliance and productivity — it achieves both from the same investment.
Noise risk checklist for your facility
Before speaking to a supplier, it is worth establishing your current exposure position:
- Has a noise risk assessment been carried out in the last three years, or following any significant change in process or equipment?
- Do any workstations or work areas exceed 80 dB(A) during normal operation?
- Are workers in those areas provided with hearing protection? Is wearing it mandatory?
- Are workers regularly exposed at or above 85 dB(A)? If so, is health surveillance in place?
- Have any workers reported tinnitus, difficulty hearing in conversation, or a requirement to raise their voice to be understood at work?
- Have engineering noise controls been considered and documented as reasonably practicable — or not — for each high-noise workstation?
- Has the facility received an HSE improvement notice or informal request relating to noise in the last five years?
If you are answering yes to the first group and no to the second and third, the case for acoustic engineering controls is already established under the 2005 Regulations.
Next steps
DRH KIND supplies OTTOKIND acoustic workstation systems into the UK — purpose-designed enclosures that reduce operator noise exposure at source, manufactured in Germany to ISO 9001 standard for industrial environments.
We work with H&S and operations teams to specify acoustic workstations correctly for the noise environment, the task and the operator — and can provide post-installation noise measurement support to confirm compliance with the 2005 Regulations.
The OTTOKIND acoustic range — what the products actually are
OTTOKIND’s acoustic systems are modular architectural solutions — partition walls, open booths and closed cabins — that create quieter working environments within production and logistics facilities. They are not workstation-level enclosures. The distinction matters: these are room-scale systems that address the noise environment an operator works in, manufactured in Germany to the same ISO 9001 standard as the OTTOKIND workstation range.
All acoustic panels share the same construction: perforated sheet steel + polyester fleece absorber + smooth sheet steel. The perforated face refracts incident sound; the fleece absorbs it; the smooth back face reflects and prevents transmission. Panels are plug-in modular, available in three widths (655mm, 1,000mm, 1,250mm), and can be reconfigured as the facility layout changes.
Acoustic partition wall systems
Free-standing partition walls up to 2,500mm high, configured around individual workstations or workstation pairs. Creates a quiet zone within an open-plan production or administrative area without construction work. Typical configurations: U-shaped single workstation surround, T-shaped double workstation, double-T four-person cluster. Finish: RAL 7035 light grey. Can be combined with OTTOKIND height-adjustable workstations for a fully integrated quiet-zone specification.
Open acoustic booths
Three-sided enclosures with an acoustic ceiling — open on one side, quiet inside. Standard open cabin configuration: 3,230mm wide, 2,730mm deep, 2,620mm high. Suitable for test laboratory areas, focused assembly tasks requiring concentration, team meeting points on the production floor, or first aid and welfare areas. Interior finish: RAL 9010 pure white. The open side means no sensation of enclosure, which matters for operator acceptance.
Closed acoustic cabins
Fully enclosed rooms within the production environment — acoustic walls, ceiling and a lightweight honeycomb door unit (1,000mm wide). A practical solution where a permanent walled office or meeting room is not feasible but a quiet enclosed space is needed. Example office cubicle configuration: 4,230mm × 3,230mm × 2,620mm high, with window elements and ceiling lighting. Telephone booth configuration from 1,480mm × 1,480mm footprint — useful for HR conversations, occupational health assessments and confidential calls from the factory floor.
All acoustic systems can be combined with windows, door units and other fittings, and are designed to be taken down and reconfigured rather than demolished when operational requirements change. DRH KIND works with operations and facilities teams to specify the right configuration for the noise environment and floor plan.
The OTTOKIND acoustic range — what the products actually are
OTTOKIND’s acoustic systems are modular architectural solutions — partition walls, open booths and closed cabins — that create quieter working environments within production and logistics facilities. They are not workstation-level enclosures. The distinction matters: these are room-scale systems that address the noise environment an operator works in, manufactured in Germany to the same ISO 9001 standard as the OTTOKIND workstation range.
All acoustic panels share the same construction: perforated sheet steel + polyester fleece absorber + smooth sheet steel. The perforated face refracts incident sound; the fleece absorbs it; the smooth back face reflects and prevents transmission. Panels are plug-in modular, available in three widths (655mm, 1,000mm, 1,250mm), and can be reconfigured as the facility layout changes.
Acoustic partition wall systems
Free-standing partition walls up to 2,500mm high, configured around individual workstations or workstation pairs. Creates a quiet zone within an open-plan production or administrative area without construction work. Typical configurations: U-shaped single workstation surround, T-shaped double workstation, double-T four-person cluster. Finish: RAL 7035 light grey. Can be combined with OTTOKIND height-adjustable workstations for a fully integrated quiet-zone specification.
Open acoustic booths
Three-sided enclosures with an acoustic ceiling — open on one side, quiet inside. Standard open cabin configuration: 3,230mm wide, 2,730mm deep, 2,620mm high. Suitable for test laboratory areas, focused assembly tasks requiring concentration, team meeting points on the production floor, or first aid and welfare areas. Interior finish: RAL 9010 pure white. The open side means no sensation of enclosure, which matters for operator acceptance.
Closed acoustic cabins
Fully enclosed rooms within the production environment — acoustic walls, ceiling and a lightweight honeycomb door unit (1,000mm wide). A practical solution where a permanent walled office or meeting room is not feasible but a quiet enclosed space is needed. Example office cubicle configuration: 4,230mm × 3,230mm × 2,620mm high, with window elements and ceiling lighting. Telephone booth configuration from 1,480mm × 1,480mm footprint — useful for HR conversations, occupational health assessments and confidential calls from the factory floor.
All acoustic systems can be combined with windows, door units and other fittings, and are designed to be taken down and reconfigured rather than demolished when operational requirements change. DRH KIND works with operations and facilities teams to specify the right configuration for the noise environment and floor plan.
The OTTOKIND acoustic range — what the products actually are
OTTOKIND’s acoustic systems are modular architectural solutions — partition walls, open booths and closed cabins — that create quieter working environments within production and logistics facilities. They are not workstation-level enclosures. The distinction matters: these are room-scale systems that address the noise environment an operator works in, manufactured in Germany to the same ISO 9001 standard as the OTTOKIND workstation range.
All acoustic panels share the same construction: perforated sheet steel + polyester fleece absorber + smooth sheet steel. The perforated face refracts incident sound; the fleece absorbs it; the smooth back face reflects and prevents transmission. Panels are plug-in modular, available in three widths (655mm, 1,000mm, 1,250mm), and can be reconfigured as the facility layout changes.
Acoustic partition wall systems
Free-standing partition walls up to 2,500mm high, configured around individual workstations or workstation pairs. Creates a quiet zone within an open-plan production or administrative area without construction work. Typical configurations: U-shaped single workstation surround, T-shaped double workstation, double-T four-person cluster. Finish: RAL 7035 light grey. Can be combined with OTTOKIND height-adjustable workstations for a fully integrated quiet-zone specification.
Open acoustic booths
Three-sided enclosures with an acoustic ceiling — open on one side, quiet inside. Standard open cabin configuration: 3,230mm wide, 2,730mm deep, 2,620mm high. Suitable for test laboratory areas, focused assembly tasks requiring concentration, team meeting points on the production floor, or first aid and welfare areas. Interior finish: RAL 9010 pure white. The open side means no sensation of enclosure, which matters for operator acceptance.
Closed acoustic cabins
Fully enclosed rooms within the production environment — acoustic walls, ceiling and a lightweight honeycomb door unit (1,000mm wide). A practical solution where a permanent walled office or meeting room is not feasible but a quiet enclosed space is needed. Example office cubicle configuration: 4,230mm × 3,230mm × 2,620mm high, with window elements and ceiling lighting. Telephone booth configuration from 1,480mm × 1,480mm footprint — useful for HR conversations, occupational health assessments and confidential calls from the factory floor.
All acoustic systems can be combined with windows, door units and other fittings, and are designed to be taken down and reconfigured rather than demolished when operational requirements change. DRH KIND works with operations and facilities teams to specify the right configuration for the noise environment and floor plan.
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Statistics sourced from HSE Noise-Induced Hearing Loss statistics, Great Britain 2024/25; Control of Noise at Work Regulations 2005; Judicial College Guidelines 17th Edition; and peer-reviewed research on occupational noise and productivity.