DOI: 10.5593/sgem2017/41/S19.074


E.C. Schiopu, R.G. Popa, I.R. Pecingina
Tuesday 12 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-06-5 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 41, 581-588 pp, DOI: 10.5593/sgem2017/41/S19.074


Acoustic or phonic pollution is a type of noise pollution caused by noises, a complex of non-periodic sounds with random disagreeable insurgency that affects the psychological and biological state of human and animal organisms. The physical or objective characteristics of the noise are the strength or sound intensity (which depends on the features of the source, the distance and the possibilities of transmission or multiplication), duration and frequency. For the determination of the noise level, sound-meters, which measure the sound pressure level, are used. The noise is measured in decibels or phons, physiological units of perception by the human ear of the weakest sound excitation. The 80 dB value is the threshold at which the sound intensity becomes harmful. Acoustic pollution caused by traffic (cars, trains and airplanes) is the second environment factor that provokes disease after atmospheric pollution because it produces harmful effects on human body health, dysfunctions, disorders, insomnia, infarction, learning problems (high sounds in ears), stomach spasms, constriction and restraint of the breath, muscular tension, pupil dilatation, and, at overpower of 180 dB, death. At the level of Gorj County, the sources of noise pollution are: fixed (residential, industrial, construction and demolition areas, especially mining, energy and petroleum) and mobile (surface urban transportation, road and rail transport network). At the Paris meeting in 1990 it was established that road transportation was the main source of noise in modern society, 80% of the noise pollution of a city being the noise emitted by cars. In order to assess the quality of the environment from the point of view of the noise pollution generated by the mining machinery and the road and railway traffic, in 2016, a study was carried out on the monitoring of the noise level in various areas of Gorj county: the industrial zone of Rovinari, the influence area of the Rovinari thermal power plant, the central area of Târgu Jiu, the northern area of Târgu Jiu, the southern area of Târgu Jiu, the CFR Târgu Jiu railway station area. To monitor the level of the noise uas used a Brugge Kjaer 2250 Light sonometer, which contains the Sound Level Meter installed and measures all parameters simultaneously, for the dynamic range of 120 dB from 16.6 dB. Monitoring was performed for 6 months at 2-3 measuring points. The obtained results were compared to the maximum admissible limits of 50 dB and 65 dB respectively, with overruns being recorded at all measuring points. In order to reduce the noise pollution and noise exposure of the population, in the Gorj County, can be implemented the following measures: optimization of transport in urban areas, proper maintenance of the car park, arrangement of vegetal protection curtains between residential and traffic areas, arranging of green spaces on free lands, regulating road traffic by establishing differentiated routes by vehicle categories, avoiding compact housing areas, creating transit traffic belts in localities on national roads, using sound-absorbing materials in the construction of buildings.

Keywords: acoustic pollution, noise, evaluation, industry, traffic