Abstract
This paper studies the noise level near the mines in the Jiu Valley using the Bruel & Kjaer Noise Dose Meter Type 4448. The purpose of the paper is to determine the noise level and how it can be reduced so that it falls within the limits imposed by law. The monitoring was done for a period of three months, during which we analyzed and compared the data with the values established by law. The results of our monitoring showed that the noise due to mining activities has a rather influential aspect in terms of occupational safety and security and does not directly affect daily life.
Highlights
The Jiu Valley is a region in southwestern Transylvania, Romania, in Hunedoara county, situated in a valley of the Jiu River between the Retezat Mountains and the Parâng Mountains
The development of coal mining started in the Jiu Valley about 160 years ago, around the middle of the 19th century, when Hungarian, German, Czech and Polish workers were brought from all parts of the Habsburg Empire to work in the coal mines [1]
Measurements to determine the level of noise pollution were carried out in accordance with STAS 10009 - 88 - "URBAN ACOUSTICS Permissible noise level limits", using the calibrated Personal Noise Dose Meter Type 4448 and the QC 20 IEC 942: 1988 Class 1 acoustic calibrator. accuracy and which meets the requirements of IEC 60651, respectively with the measuring range 30-130 dB and the measurement error of +/- 0.1 dB [8]
Summary
The Jiu Valley is a region in southwestern Transylvania, Romania, in Hunedoara county, situated in a valley of the Jiu River between the Retezat Mountains and the Parâng Mountains. The region was heavily industrialised and the main activity was coal mining, but due to low efficiency, most of the mines were closed down. During the Middle Ages, the inhabitants of the Jiu Valley lived in huts spread along the mountains, and often near the river, and the main activity was shepherding. The development of coal mining started in the Jiu Valley about 160 years ago, around the middle of the 19th century, when Hungarian, German, Czech and Polish workers were brought from all parts of the Habsburg Empire to work in the coal mines [1]. Voltage, displacement and speed of particles in an environment with different forces. It can move in the form of longitudinal or transverse waves
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