Noise is a major and continual problem both for our health and the environment. Here, the team at Hellberg Safety examine the ways that employers and employees can take a proactive approach to hearing protection on-site.
Noise pollution is with us all day, every day and, while more recent legislation has been enacted to regulate its effect on our environment, Health and Safety at Work regulations have been in place for some years to ensure safety and wellbeing in the workplace.
Noise-induced hearing loss is one of the most commonly reported physical diseases in the world β particularly in the workplace. Itβs an accumulated disease that increases at every point of over-exposure to noise and the bad news is that hearing loss could be permanent. The good news is that it is easy to avoid!
Itβs the law!
By law employers have to assess and identify measures to eliminate or reduce risks from exposure to noise so that the hearing faculties of employees can be protected. In low-risk environments preventative actions can be relatively simple and inexpensive.
Where risks are high, however, they have to be assessed and managed using control actions that include the provision of appropriate hearing protection equipment as well as information, training and health surveillance for employees.
Employers are required to provide employees with properly maintained hearing protectors, ensure they use them properly and establish hearing protection zones where the use of hearing protection is compulsory.
At Hellberg Safety we recommend always reducing noise levels to a maximum of 75 dB, simply because maintaining dB levels can be affected by a number of external factors.1
If youβre unsure of what the local noise level is, a useful rule of thumb is that if you need to raise your voice to be heard when youβre about three feet or so from someone else, the ambient noise level around you could be a risk to health.
Whatever a manufacturerβs product specification or protection level may be, the attenuation of noise provided by a pair of hearing protectors can decrease due to insufficient fitting, misuse and poor maintenance. Long hair, beards and glasses can affect the fit of the protector, hence the greater the effective noise abatement, the more your hearing is protected.
It is important to remember though, that too much attenuation can be dangerous too, especially if it stops you from hearing warning signals. Thatβs why it is really important to choose the correct hearing protection based on your needs and assessed risk levels.
Assess risk and protection together
Risk assessments for noise hazards can be obtained through a professional service β and theyβre important in ensuring proper health and safety responsibility β but it is a relatively straightforward process to identify the level of a risk based on available noise hazard indicators and then source a suitable product solution. For example, and as an indication of a noise level in relation to dB measurements, a fairly quiet conversation in an office may reach 60 dB, a vacuum cleaner up to 70 dB.2
On the upward scale of noise, a food blender can reach 80 dB and a chainsaw 120 dB. To give an idea of the latter twoβs risk to hearing, extended exposure to the noise of a food blender requires hearing protection, while exposure to the noise of even the most basic chainsaw can be potentially painful to your hearing without proper protection. Anything above that offers considerable potential for serious and permanent damage to hearing.3
Choosing the right hearing protection
Never assume that a basic pair of ear defenders will protect against high-risk noise. Always use hearing protection when exposed to harmful noise and, if necessary, choose a protector adapted to your work environment, i.e a product with βlevel dependent hearing protectionβ.
To identify an appropriate hearing protection product, check out the noise sources graduated chart within this article. Within that chart, identify the hazard level of the noise source β green is low-risk, yellow is medium-risk, red is high-risk. Then select the appropriate type ear defenders β look for the colour coded ear-piece bands which define the different protection levels.
Protection Level 1 β green β is designed for general industrial environments and an appropriate choice for low to medium dB noise levels and medium to high frequency noise (Hz). Protection Level 2 β yellow β provides the best protection for high frequency noise (Hz) and are appropriate for medium to high dB noise levels. For extremely high noise levels, Protection Level 3 products β the red band β are the only suitable choice.
Itβs also important to consider the type of protection required β passive or electronic. Passive hearing protectors are self-contained ear defenders which block harmful sounds. They have no built-in electronics but provide excellent protection against loud and dangerous noise. Electronic hearing protectors have added technical functionality which facilitates wireless or Bluetooth communications and emergency signalling between workers.
So choose hearing protection products that are appropriate for specific risk environments. Make sure products fit correctly and are comfortable during the entire hazard exposure time at work. You should even consider using them if youβre mowing the lawn or strimming at home β the noise hazard and its potential effect on your hearing is the same.
You should ensure 100% wear time in noisy environments and remember that the use of eyewear can reduce the hearing protectorβs attenuation of between 3-8 decibels β if possible, select thin eyewear frames.
Finally, your health and wellbeing on-site is of huge importance, so choose your PPE products carefully, understand how theyβre protecting your health and wellbeing and ensure theyβre used properly for maximum beneficial effect.
With that in mind check out the Hellberg Safety website (www.hellbergsafety.com) where youβll find all the information you need on choosing precisely the right kind of passive or active hearing protection for whatever youβre doing or wherever youβre working on-site.
Key references
1. www.hellbergsafety.com/guides/noise-andhearing/ the-risks-of-noise
2. https://carleton.ca/ehs/programs/workingworkshop/ noise-hazards/. Accessed May 2022.
3. https://carleton.ca/ehs/programs/workingworkshop/ noise-hazards/. Accessed May 2022.
4. The examples listed in the graduated chart are examples noise sources with approximate sound pressure levels in dB(A). These examples should only be seen as guidance given that variations may occur depending on the type of noise sources. For example, food blenders come in a range of different sizes and capacities. Similarly, chain saws are available in a range of different chain and engine sizes. (Hultafors Group UK, Product and Price List, February 2022, page 69).
To browse Hellberg Safety’s range of noise protection products, click here
