Noise
Noise - any unwanted sound, especially if it is loud, unpleasant and annoying. Noise in the workplace can have both short-term and long-term negative effects : it can be annoying, can interfere with verbal communication and mask warnings, and it can damage workers’ hearing (either temporarily or permanently). Ear is sensitive to sounds between 20 HZ to 20 KHz. Intensity of sound is measured in decibels (dB), Exposure in excess of 115 dB without ear protection even for a short duration is not recommended. This equates to standing within a few hundred metres of a moving jet aircraft. General background noise can be ‘filtered out’ by the brain through focused attention. Hearing protection ...