The paper presents an analysis of noise emitted by selected machine tools in a production hall (under industrial conditions). Noise monitoring is a fundamental task for maintaining workplaces which are safe and healthy. This paper presents the noise measurements obtained for several machine tools, performed in accordance with the PN ISO 230-5:2002 standard. The identification of noise sources and levels was conducted by means of the UNIT 352 measurement system for DMU 50, BGO-CNC/RV/R, FU 251, FW 801, FWC 25/H. Detection of noise sources in the tested machine tools allows to maintain safety of workers and effective means of noise reduction, which are highly significant from the perspective of minimising noise at various workstations. The method of performing noise measurements at workstations using specific machines is normalised, so that the results of such measurements for different machines could be compared. The test results were presented in the form of diagrams and tables. The results of the tests are concluded by a detailed recommendation for the CNC machine tool operators to use hearing protection when at work. The results showed that the level of noise at the operator's workstation significantly exceeds the standard at certain machining parameters.
High-frequency electromagnetic field monitoring is extremely important for the environment. Recording and continuous observation of the levels of harmful factors and their evaluation should be examined by means of systematic and reliable measurements. The purpose of the present research stems from the need for verification and analysis whether modern phones are safe for users during telephone conversations. The analysis was carried out with the use of two ESM 120 and ESM 140 meters measuring the same devices simultaneously. The SAR (Specific Absorption Rate) describes the energy processes in the biological tissues exposed to electromagnetic fields (EMF). The maximum values recorded by the ESM 140 dosimeter are SAR = 0.5 mW/kg.
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