In the “Korean Industrial Safety and Health Act,” noise work is defined as generating noise levels exceeding 85dB during an 8-hour workday.
Working in environments with excessive noise levels poses health risks such as noise-induced hearing loss, especially with prolonged exposure.
In areas where excessive noise is present, it is imperative to wear hearing protection.
For earplugs and earmuffs, ensure they are certified by the Korea Occupational Safety and Health Agency, indicated by the ‘KCs Certification Mark.’
Check the capacity and grade indicated by the safety certification, and use products suitable for the working environment and the level of noise generated.
Store and use earplugs to prevent contamination, especially being cautious not to touch them with dirty hands or allow foreign substances to enter the ears while wearing them. Whenever possible, use disposable earplugs and replace them frequently to maintain cleanliness and prevent inflammation in the ears.
In workplaces with noise levels exceeding 110dB to 120dB, wearing earplugs and earmuffs simultaneously enhances noise reduction. Earplugs typically provide a noise reduction rating (NRR) of 25dB to 35dB, while earmuffs offer an NRR of 35dB to 45dB. Wearing both earplugs and earmuffs can further reduce noise by an additional 3dB to 5dB. After wearing hearing protection devices, noise levels should be reduced to 85dB or less to ensure hearing protection.
Earmuffs should completely seal the entire ear and it’s best to avoid anything like hair or earrings that might interfere with covering the entire ear properly. If earplugs are loosely inserted or earmuffs are not worn correctly, the effectiveness of noise reduction may be compromised, so be mindful of this. Consider options that can be used alongside safety helmets, masks, goggles, etc., and ensure workers can choose what suits them best.