Noise Risk Assessment
The University has a duty to prevent or reduce risks to health and safety from exposure to noise in its workplaces. The Noise Regulations (The Control of Noise at Work Regulations 2005) require that an assessment of the risks from noise at work is made and that (a) legal limits on noise exposure are not exceeded and (b) action is taken if necessary to reduce the noise exposure that produces the risk. Hearing protection (e.g. ear defenders) may have to be provided if the noise exposure cannot be reduced enough by other methods (e.g by putting noisy equipment inside a noise attenuation cabinet). Information, instruction and training must also be provided to workers, and where the risk assessment has identified a risk to health, health surveillance must be provided.
The Noise Regulations require specific action to be taken at certain action values. These relate to:
· the levels of exposure to noise of workers averaged over a working day or week
· the maximum noise (peak sound pressure) to which workers are exposed in a working day.
The values are:
Lower exposure action values:
- daily or weekly exposure of 80 dB;
- peak sound pressure of 135 dB;
Upper exposure action values:
- daily or weekly exposure of 85 dB;
- peak sound pressure of 137 dB.
There are also levels of noise exposure which must not be exceeded:
Exposure limit values:
- daily or weekly exposure of 87 dB;
- peak sound pressure of 140 dB.
These exposure limit values take account of any reduction in exposure provided by hearing protection
Taking Action to Reduce Noise Exposure
Wherever there is noise at work you should be looking for alternative processes, equipment and/or working methods which would make the work quieter or mean people are exposed for shorter times. You should also keep up with what is good practice or the standard for noise-control connected to the associated industry (where the equipment is generally used), eg through a trade association, or machinery or equipment suppliers.
Where it is likely that exposure to noise is at or above the upper exposure action values, you must take action to reduce noise exposure with a planned programme of noise control.
Even where noise exposures are below upper exposure action values, you should take action to reduce the risks, eg reducing exposure further.
Any action you take should be ‘reasonably practicable’ – in proportion to the level of risk. If exposure is below lower action values, the risk is low and it is likely no action is required – but if there are simple, inexpensive practical steps that would reduce risks further, you should consider implementing them.
First think about how to remove the source of noise altogether – for example, housing a noisy machine where it cannot be heard by workers. If that is not possible, investigate:
- using quieter equipment or a different, quieter process - gather information from the supplier on noise levels for the equipment you are interested in before you place your order and make comparisons with other equipment on the market;
- engineering/technical controls to reduce, at source, the noise produced by a machine or process;
- using screens, barriers, enclosures and absorbent materials to reduce the noise on its path to the people exposed;
- designing and laying out the workplace to create quieter work areas;
- improved working techniques to reduce noise levels;
- limiting the time people spend in noisy areas.
Measures that give ongoing or medium- and long-term benefits expected as part of a noise-control programme expected of Departments are:
- ensuring noise is considered prior to purchase of machinery and equipment (low-noise policy);
- proper and regular maintenance of machinery and equipment that takes account of noise.
Guidance to support the management of noise in the workplace is also available for specific sectors. The Music and Entertainment sector has dedicated guidance in this area.
Hearing protection should be issued to persons:
- where extra protection is needed above what has been achieved using noise control;
- as a short-term measure while other methods of controlling noise are being developed.
You should not use hearing protection as an alternative to controlling noise by technical and organisational means. Where there remains a requirement to provide hearing protection, see the accompanying guidance: Providing Hearing Protection
Providing Hearing Protection
The Noise Regulations require you to:
- provide hearing protectors to workers and make sure they use them fully and properly when their noise exposure exceeds the upper exposure action values (at or above 85dB(A));
- provide hearing protectors if workers ask for them, and their noise exposure is between the lower and upper exposure action values (between 80dB and 85dB(A));
- identify hearing protection zones – areas of the workplace where access is restricted, and where wearing hearing protection is compulsory.
To make sure protectors are worn fully (all of the time they are needed) and properly (fitted or inserted correctly) will require you to have systems of supervision and training. Also consider the use of spot checks and audits.
Providing health surveillance
Health surveillance is required for any employees who are likely to be frequently exposed above the upper exposure action values, or are at risk for any reason, eg they already suffer from hearing loss or are particularly sensitive to damage.
Occupational Health can provide advice and information to managers and staff on health matters including health surveillance. Health surveillance needs should have been identified during the risk assessment process.
Approved signage and PPE suppliers can be found via the Procurement webpages