TITLE:
Acoustic Analysis of Machineries in the Cement Industry
AUTHORS:
Alireza Noorpoor, Ali Ahmadi Orkomi
KEYWORDS:
Sound Pressure Level, Measurement, Cement Industry, Sound Power Level, Design Parameters
JOURNAL NAME:
Open Journal of Safety Science and Technology,
Vol.4 No.2,
June
25,
2014
ABSTRACT: A study has been conducted at the Tehran cement factory to recognize and
analyze the major noise emission source machineries. Cement industry has many
process units. Basically all of these units or stages can be considered as a
source of noise. Since noise pollution is defined based on its offensive
hearing effects, the importance of the noise sources depends directly on the
number of workers in the unit. In this survey, first, the mean A-weighted sound
pressure level and number of the workers in each unit have been measured and
the obtained data were analyzed in Microsoft Excel. The noisiest units have
been recognized and some applicable suggestions offered to reduce the sound
exposure level. Afterwards, based on the mentioned ISO, some experiments have
been done to calculate the A-weighted acoustic power level of the crusher which
emitted the highest level of noise. By calculating the sound power levels and
considering the affecting design parameters on the sound power generated by the
crusher, an empirical equation has been presented to calculate the acoustic power
level as a function of physical parameters horsepower, number of hammers and
the weight of each hammer.