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A noise problem can arise from one of three sources: It may be airborne, structure-borne, or a combination of the two. Airborne noise control is achieved either by reducing noise in the environment of a listener, or reducing noise at its source, for example, by designing quieter machinery or enclosing loud machines. Enclosing a noise source to reduce propagated sound presents the somewhat daunting challenge of balancing contradictory factors; the enclosure must be sufficiently airtight to... więcej
Salem Press Encyclopedia of Science, 2022. 3p.
