If workers’ hearing is to be protected and relevant health and safety law complied with, there will be a need for employers to carry out accurate noise measurements.
Using suitable noise meters available from RS can help organisations and competent personnel gather useful information about workplace sound levels.
From there, such decision-makers will be better placed to identify situations where further action may be necessary.
The Importance of Workplace Noise Measurements
Excessive noise in the workplace can bring about permanent hearing damage and tinnitus. It can also present wider safety risks by making verbal communication trickier and potentially preventing employees from hearing alarms, warnings, or approaching vehicles and machinery.
Using Great Britain as an example, the Control of Noise at Work Regulations 2005 require employers to assess the risks that noise at work may pose to their staff. Furthermore, the legislation sets out the need for employers to take appropriate action to prevent or reduce exposure.
The Regulations establish lower and upper exposure action values, as well as exposure limit values. Specifically, these are:
- Lower exposure action values of 80 dB(A) in daily or weekly personal noise exposure, and a peak sound pressure of 135 dB(C).
- Upper exposure action values of 85 dB(A) and 137 dB(C) At these levels, further duties apply, including mandatory hearing protection, noise control programmes, and health surveillance.
- Exposure limit values of 87 dB(A) and 140 dB(C), taking hearing protection into account. Noise exposure at the workplace must never go beyond these values.
A formal noise measurement process can therefore provide valuable evidence for employers as they assess whether their workers could be exposed to potentially harmful levels.
Can’t Employers Just Assess Based on “Rules of Thumb”?
In the absence of proper noise measurements, employers’ assessments would be forced to rely on rough estimates, manufacturer data, or simple “rules of thumb” (for example, whether workers need to raise their voices to be heard at one to two metres).
These approaches can underestimate peaks, miss intermittent or varying exposure, or fail to capture the true daily dose that workers experience.
This is why it can be so important for employers subject to the requirements of the Control of Noise at Work Regulations to arrange for proper noise measurement. This process should involve the use of integrating sound meters capable of recording A-weighted equivalent continuous levels (LAeq) and C-weighted peak levels.
Doing this will go a long way to transforming a general risk assessment into a much more precise, evidence-based one.
Measuring Noise Levels Allows for Data to Be Turned into Better Decisions
There are several practical ways in which noise measurement supports improved workplace assessments:
- It Helps Identify Who Is at Risk and Where
Spot measurements and personal dose assessments help draw attention to the specific roles, tasks, or areas where action values may be exceeded.
This avoids low-risk areas being overprotected, at the same time as helping ensure high-exposure workers benefit from the right controls.
- It Helps with Noise Control Prioritisation
When employers are well-informed on the sound levels and the sources of noise wherever their employees operate, they will be more strongly placed to focus on the necessary engineering solutions.
Those measures could encompass quieter machinery, enclosures, damping, and/or maintenance. It’s certainly preferable to a situation where relatively oblivious employers simply rely on giving their workers hearing protection.
- It’s Useful for Selecting and Verifying Hearing Protection
Organisations having access to accurate octave-band or overall level data puts them in a position to select protectors with the correct attenuation.
It also supports employers’ later checks that hearing protection remains effective during use in “real-world” conditions.
- It Supports Health Surveillance and Training
The measurement of noise exposure allows employers to determine who requires audiometric testing. In addition, it provides concrete information for worker training on risks and the correct use of controls.
- It Demonstrates Compliance and Helps with Reviewing Change
Documented measurements form a clear audit trail for regulators such as the UK Health and Safety Executive (HSE), as well as insurers and internal audits.
This documentation also makes it a straightforward task to reassess after process changes, new equipment, or layout alterations.
Conclusion: The Right Noise Measuring Devices Can Make a Profound Difference
Effective workplace noise assessment depends on more than simply having a sense of a given environment “sounding loud”.
Appropriate measurement equipment can provide objective information about sound levels, help pinpoint noisy processes, and contribute to a more representative understanding of workers’ noise exposure.
The combination of such equipment with competent assessment and suitable noise-control measures can leave employers well-placed to protect the hearing, wellbeing, and productivity of their staff.
