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Frequencies Rotation at High Sound Pressure Levels Toward Low Frequencies

Sound & Vibration 2020年第4期54卷 237-246页

作者： hadi negahdari Sirus Javadpour Faramarz Moattar Department of Environmental Engineering Faculty of Natural Resources and EnvironmentScience and Research BranchIslamic Azad UniversityTehranIran Materials Science and Engineering Department School of EngineeringShiraz UniversityShirazIran

Today,analyzing of sound pressure level and frequency is considered as an important index in human *** experts believe that analyzing of these parameters can help us to better understanding of work *** measurements and frequency analysis did to fix the harmful frequency in all sections in Shiraz gas power plant with sound analyzer model BSWA *** sound pressure levels(LP)and the one and one-third octave band were continuously measured in A and C weighting networks and slow mode for time *** 2013 and Minitab 18.1 software used for statistical *** analyzed by Minitab 18.1 *** highest harmful frequency in Shiraz Gas Power Plant(SGPP)was 50 Hz with 115 *** sound pressure level(SPL)ranged from 45 dB to 120 dB in one-third octave band and weighting network *** maximum sound pressure level was in Craft electricity generator with 105.3 dB and 67 *** pressure level in surrounded environment was 120 *** to the results,in this industry the sound pressure level exceeded the Occupational Exposure Level of Iran(OEL).The value of sound pressure level were higher than the Standard of occupational *** consumes 47000 cubic meters of natural gas per hour to produce 100 MW(Mega Watt)of *** is very high and it is not economical and cost *** numbers indicate that the power plant’s efficiency is *** could be concluded that the noise pollution is an important issue in these ***,SGPP produce noise with loss *** rotation at high sound pressure levels toward low frequencies were happened.

关键词： Sound waves noise-induced occupational safety industrial health noise

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