Mitigating Noise Pollution Level When Loading Useful Mineral …
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• Analysis of noise measurements carried out when loading useful mineral
substances in automotive and CFR vehicles, noise exposure level was between
64.9 and 93 dB (A) exceeding the 87 dB occupational exposure limit (A) when
loading wagons. In this case, spectrograms have also been measured to assess the
exceeding over frequencies in order to establish optimal noise reduction solutions.
• Measured acoustic pressures show exceeding of 1.3–27 dB, compared to legal
limits for noise level at industrial premises limit (max 65 dB (A)).
• Spectrogram analysis showed exceeding medium and high frequency bands
considered dangerous, with values between 0.1 and 9 dB, taking technical and
organizational measures being mandatory.
Considering that noise reduction is a complex problem, the purpose of reducing
noise is to achieve acoustic comfort at an acceptable price; the primary variables
of the system are acoustic characteristics and costs. The concept of noise reduction
system is generally a compromise between acoustic performance and costs.
In conclusion, application of soundproofing barriers at the point of loading useful
mineral substances in auto and CFR transportation means will reduce the impact of
industrial activities on neighbours (lowering below 65 dB (A) at industrial premises
limit) in accordance with the technical data provided by the manufacturer of sound
absorbing/sound insulating panels [7].
References
1. A. Draghici, M. Kovacs, L. Toth, Occupational health and safety regarding the exposure to
noxious of workers from the steel industry. Metal Int 18(2), 147–153 (2013)
2. *** Law 319/2006 Law on Safety and Health at Work
3. *** Directive 2002/49/EC of the European Parliament and of the Council of 25 June 2002
relating to the assessment and management of environmental noise
4. G.D. Vasilescu, A.N. Draghici, C. Baciu, Methods for analisys and evaluation of occupational
accidents and diseases risks. Environmental Engineering and Management Journal 7(4), 443–446
(2008)
5. S. Sorin, V. Ciprian, K. Marius, in Exposure of workers to noise in mining industry, ed. by N.
Herisanu, V. Marinca, 12th International Symposium Acoustics and Vibration of Mechanical
Structures (AVMS 2013), Timisoara (2013)
6. S. Simion, S. Simion, Prevention and reduction of noise emissions from industrial mining
processes, (INSEMEX Publishing House, Petros , ani, 2008). ISBN: 978-973-88753-0-2
7. Acoustic Design Homepage, https://sites.google.com/site/controlzgomot/solutii-acustice/pan
ouri-acustice. Last accessed 2019/02/02
8. Marcegaglia Homepage. http://www.marcegaglia.ro/marcegaglia_product/parapete-antifonicede-siguranta-integrate-panouri-fonoabsorbante-100-al-pe/. Last accessed 2019/02/02
9. Hericon Homepage. http://hericon.ro/panouri_sandwich/panou_fonoizolante.html. Last
accessed 2019/02/02
215
• Analysis of noise measurements carried out when loading useful mineral
substances in automotive and CFR vehicles, noise exposure level was between
64.9 and 93 dB (A) exceeding the 87 dB occupational exposure limit (A) when
loading wagons. In this case, spectrograms have also been measured to assess the
exceeding over frequencies in order to establish optimal noise reduction solutions.
• Measured acoustic pressures show exceeding of 1.3–27 dB, compared to legal
limits for noise level at industrial premises limit (max 65 dB (A)).
• Spectrogram analysis showed exceeding medium and high frequency bands
considered dangerous, with values between 0.1 and 9 dB, taking technical and
organizational measures being mandatory.
Considering that noise reduction is a complex problem, the purpose of reducing
noise is to achieve acoustic comfort at an acceptable price; the primary variables
of the system are acoustic characteristics and costs. The concept of noise reduction
system is generally a compromise between acoustic performance and costs.
In conclusion, application of soundproofing barriers at the point of loading useful
mineral substances in auto and CFR transportation means will reduce the impact of
industrial activities on neighbours (lowering below 65 dB (A) at industrial premises
limit) in accordance with the technical data provided by the manufacturer of sound
absorbing/sound insulating panels [7].
References
1. A. Draghici, M. Kovacs, L. Toth, Occupational health and safety regarding the exposure to
noxious of workers from the steel industry. Metal Int 18(2), 147–153 (2013)
2. *** Law 319/2006 Law on Safety and Health at Work
3. *** Directive 2002/49/EC of the European Parliament and of the Council of 25 June 2002
relating to the assessment and management of environmental noise
4. G.D. Vasilescu, A.N. Draghici, C. Baciu, Methods for analisys and evaluation of occupational
accidents and diseases risks. Environmental Engineering and Management Journal 7(4), 443–446
(2008)
5. S. Sorin, V. Ciprian, K. Marius, in Exposure of workers to noise in mining industry, ed. by N.
Herisanu, V. Marinca, 12th International Symposium Acoustics and Vibration of Mechanical
Structures (AVMS 2013), Timisoara (2013)
6. S. Simion, S. Simion, Prevention and reduction of noise emissions from industrial mining
processes, (INSEMEX Publishing House, Petros , ani, 2008). ISBN: 978-973-88753-0-2
7. Acoustic Design Homepage, https://sites.google.com/site/controlzgomot/solutii-acustice/pan
ouri-acustice. Last accessed 2019/02/02
8. Marcegaglia Homepage. http://www.marcegaglia.ro/marcegaglia_product/parapete-antifonicede-siguranta-integrate-panouri-fonoabsorbante-100-al-pe/. Last accessed 2019/02/02
9. Hericon Homepage. http://hericon.ro/panouri_sandwich/panou_fonoizolante.html. Last
accessed 2019/02/02