Abstract.The purpose of this study was to measure the sound meter Separate frequency of sound and mapping the volume. To indicate the position of the machinery and equipment, which is used for causing the noise. To analyze and determine the guidelines on how to prevent and resolve, machinery, equipment, ทำให้เกิดเสียงดัง tool used in the research. Detector noise brand 01DB DUO version by measure the sound cover area Steam building I Ground floor thermal power plant in the South Bangkok 2 combination in the form of average volume Leq 3 minutes of 225 points to the data measured to จัดทำแผน volume (Noise Contour. Map).The result showed that the average volume Leq ranged from in the 81.3 - 93.3 Dez bell a maximum noise levels (Lmax) in 94.4 DBA. And the minimum volume (Lmin) in 80.0 DBA by areas with the highest average volume is the machinery Air Compressor. Pump when monitoring separate voice frequency showed that the noise average (Leq) in the 88.4 - 92.6 de ซิเบ IL AE and be in the frequency range.63 - 4000 Hz by loud noise in the frequency range level 2000 Hz.Key words: power plant thermal energy, map volume, Steam building.
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