HEALTH & SAFETY SOUND ADVICE
What makes a good noise dosimeter, asks Casella.
Noise remains a key issue in workplaces across the UK, with the Health & Safety Executive estimating that over two million workers are exposed to unacceptable levels of noise each year. Of the two million people that were subjected to excessive noise levels last year, 15,000 are expected to have work-related hearing problems.
It is the duty of the employer to control noise and ensure employees’ hearing health is protected under the Control of Noise at Work Regulations (2005). To understand the level of exposure to employees, managers can conduct noise monitoring using either a sound level meter (SLM) or a noise dosimeter.
Both measurement devices have a place in workplace monitoring, with sound level meters ideal for analysing noise at a specific location or identify the sound output for a particular piece of machinery. Noise dosimeters however are suitable for more dynamic monitoring applications, as is often found in modern facilities, by being attached to a worker as they travel across the workplace which provides measurement of the personal exposure throughout the workday.
“Calming tones in high stress areas or energising hues in collaborative spaces can subtly influence behaviour and comfort."
Studies have found wearables can improve OSH compliance, identify training needs, and prevent accidents and injuries through the use of real-time data which enables better-informed decision-making by managers and workers. However, the research has also shown that for instance, when wearable devices are uncomfortable for the wearer and not a proper fit, they can lead to non- compliance. Workers can also become over-reliant on automated warnings instead of maintaining situational awareness and attention.
To ensure these devices effectively mitigate the risks of noise-induced hearing loss, several critical design features must be prioritised. A high-quality noise dosimeter is defined by its ability to blend seamlessly into the worker's routine while providing high-fidelity data for safety managers.
Small size and ergonomics A barrier to consistent noise monitoring is wearer non- compliance. If a device is bulky, heavy, or otherwise
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cumbersome, workers are likely to remove it or reposition it incorrectly which compromises the study. By maintaining a small size and lightweight profile, the device can be mounted directly on the shoulder without impeding movement or causing discomfort. This unobtrusive nature is essential for capturing 'natural' behaviour, ensuring the data reflects a typical workday rather than one where the worker is restricted by their equipment.
Robustness and durability Workplaces with high noise levels, such as construction sites, manufacturing plants, or mines, are often harsh environments. A good dosimeter must be robust enough to withstand dust, moisture, and physical impacts. Look for devices with high IP (Ingress Protection) ratings and rugged housings and a modern ‘MEMS’ microphone that can endure the rigors of industrial use without technical glitches.
Accurate data, advanced analytics Accuracy is the cornerstone of any health and safety intervention. A reliable dosimeter must provide accurate data that complies with international standards such as IEC 61252. Equally, data collection should be comprehensive and simple to allow anyone to conduct the necessary monitoring without the necessary technical understanding. Opting for a noise dosimeter that can measure across all parameters, including averages, peaks and eight-hour exposure, to a level of up to 140dB, helps ensure measurements are taken that can be compared to action values, and enabling suitable noise controls to be implemented.
Conclusion A superior noise dosimeter must balance a small, ergonomic form factor with extreme physical robustness. By prioritising accurate data collection and user comfort, employers can ensure high compliance and reliable monitoring. Ultimately, these features transform a simple wearable into a life- changing tool that effectively shields workers from the invisible threat of permanent hearing damage.
www.casellasolutions.com
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