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10 ENGINEERING NOISE CONTROL - WHO
www.who.int246 Engineering noise control Figure 10.1. Desired noise spectrum for an overall level of 90 dB(A). To adequately define the noise problem and set a good basis for the control strategy, the
10 ENGINEERING NOISE CONTROL - World Health …
www.who.intsound energy from the source travels. In fact, there may be a multiplicity of paths, both in air and in solid structures. The total path, which contains all possible avenues along which noise may reach the ear, has to be considered. As a last resort, or as a complement to the environmental measures, the noise control