Transcription of 10 ENGINEERING NOISE CONTROL - WHO
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10 ENGINEERING NOISE CONTROL - WHO
10. ENGINEERING NOISE CONTROL . Professor Colin H. Hansen Dr Berenice Goelzer*. Department of Mechanical ENGINEERING World Health Organization University of Adelaide South Australia 5005. AUSTRALIA. INTRODUCTION. As with any occupational hazard, CONTROL technology should aim at reducing NOISE to acceptable levels by action on the work environment. Such action involves the implementation of any measure that will reduce NOISE being generated, and/or will reduce the NOISE transmission through the air or through the structure of the workplace. Such measures include modifications of the machinery, the workplace operations, and the layout of the workroom. In fact, the best approach for NOISE hazard CONTROL in the work environment, is to eliminate or reduce the hazard at its source of generation, either by direct action on the source or by its confinement. Practical considerations must not be overlooked; it is often unfeasible to implement a global CONTROL program all at once.
octave or one-third octave frequency bands (see chapter 1). Once the noise levels have been measured and the required reductions determined, the next step is to identify and rank order the noise sources responsible for the excessive noise. The sources may be subtle or alternatively many, in which case rank ordering may be as important as ...
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