Prolonged exposure to high levels of noise can damage the sensitive structures in the inner ear, leading to permanent hearing loss. In the workplace, where machinery and equipment can generate loud sounds, employees could find themselves at risk. It is crucial to understand the implications of noise-induced hearing loss (NIHL) and take proactive measures to protect your workforce.
Exposure Levels
Exposure to high levels of noise can cause both temporary and permanent hearing damage. Noise is measured in decibels (dB) and sounds above 85 dB can be harmful with prolonged exposure. For example, regular exposure to sounds at 85 dB (such as heavy traffic) can cause hearing damage over time, while sounds at 120 dB (like loud machinery) can cause immediate harm.
Mid-range frequencies (3,000 to 6,000 Hertz) are particularly susceptible to damage from loud noises. These frequencies are used for communication and are the most sensitive. When these frequencies are damaged, it can be challenging to hear consonants and other high-pitched sounds, leading to difficulty in understanding speech.
Audiograms
An audiogram is a graph that displays the results of a hearing test. It shows the softest sounds a person can hear at various frequencies. Occupational health specialists use audiograms to detect hearing loss patterns. They look for a curve that meets the requirements of “Cole’s Notch”, the criterion most often used to identify NIHL. Regular audiometric testing is crucial in loud workplaces for monitoring employees’ hearing health and catch any early signs of hearing loss.
Diagnosis
If you begin to notice the signs of noise-induced hearing loss, it’s essential to take immediate action to prevent further damage. Here are the steps you should follow:
- Inform your employer, they need to be aware so they can take steps to reduce your noise exposure.
- Get a detailed assessment from an occupational health specialist or your GP.
- Use hearing protection to conserve what hearing you have left.
- Schedule regular hearing tests to monitor your hearing and adjust your protection strategies as needed.
- Talk to your GP about a hearing aid if you are having trouble communicating.
The workplace
Jobs in industries such as construction, manufacturing, and transportation often involve exposure to loud machinery and tools. For example, construction workers frequently use jackhammers, drills and heavy machinery, all of which can produce noise levels exceeding safe limits. Employers in these industries must be vigilant in protecting their workers from NIHL. This includes conducting regular noise assessments, introducing a health surveillance programme, providing appropriate hearing protection and implementing engineering controls to reduce noise levels.
Final thoughts
Noise-induced hearing loss is preventable with the right measures and awareness. At MOHS, we are committed to helping businesses in the West Midlands safeguard their employees’ health. Our comprehensive health surveillance and audiometry services can identify early signs of hearing. We can guide you in implementing effective preventive measures. Contact us today at info@mohs.co.uk or call us on 0121 601 4041 to speak to a friendly member of our team.