Abstract
Outdoor noise of several fossil-fuel power plants was measured for varying purposes. Typical continuous noises were generated by water circulation pumps, forced-draft fans and induced-draft fans, emergency diesel engine generators, stacker-reclaimers, SO2 systems, and gas-turbine peaking units. Transient noises included the bumping of coal cars and coal unloading. Another transient noise source was the main steam and cold reheat lines during steam purge. All noises were recorded on magnetic tapes and analyzed using a 1/3-octave band-filter system and in terms of statistical data. Noise propagation was interpreted from topographic conditions, meteorologic effects and sound attenuation factors. The community noise impacts for both continuous noises and transient noises are discussed along with necessary noise controls. One outdoor noise survey of an existing power plant served as a baseline ambient noise measurement for further expansion of the plant. The environmental noise of the expanded plant was also predicted.
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