Industrial noise
From Free net encyclopedia
Traditionally, workplace noise has been a hazard linked to heavy industries such as ship-building and associated only with noise induced hearing loss (NIHL).
Modern thinking in occupational safety and health identifies noise as hazard to worker safety and health in many places of employment and by a variety of means.
Noise not only makes a person deaf (at exposures of over 85 decibels (dB)), but it also acts as a causal factor for stress and raises systolic blood pressure.
Additionally, it can be a causal factor in work accidents, both by masking hazards and warning signals, and by impeding concentration.
Noise also acts synergistically with other hazards to increase the risk of harm to workers. In particular, noise and dangerous substances (e.g. some solvents) that have some tendencies towards ototoxicity may give rise to rapid ear damage.
Industrial noise reduction
When two identical industrial noise sources are side by side producing a recorded noise at 100 dB(A) the reduction in noise from shutting off one of the noise sources is about 3 dBA resulting in 97 dBA.
When one doubles the distance from a noise source the recorded noise level is reduced by 6 dBA. This is also called the Rule of 6.