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Evaluation of traffic noise pollution in chosen sites in Krakow

Zuchnicka P., Korzeniowska J.

Logistyka

2015

nr 4

9980--9986, CD3

Traffic noise (car, rail and air transport) has an influence on human health and the comfort of human life. The human body experiences the harmful effect of traffic noise beginning at values slightly higher than hearing range. This effect involves excessive tiredness, drowsiness and discomfort. Equilibrium, psychomotor fitness and physiological functions may also be disturbed. Acoustic pressure higher than 140 dB causes permanent harmful changes in the human body. This study evaluated traffic noise pollution at three selected sites in Krakow. At the research sites, two sources of traffic noise were present: car and rail transport (trams). The sites were located in the city centre and in the outskirts of the city. The level of traffic noise was measured at three sites in Krakow (research site A: Teligi Street, research site B: Nowy Bieżanów tram balloon loop and research site C: Piłsudski Bridge) on different days of the week (Wednesday and Sunday) and during different times of the day (morning, afternoon and evening). The obtained results show that the level of traffic noise was the highest on the Piłsudski Bridge (research site C), where most of the values exceeded the permissible norms. The two remaining research sites (A: Teligi Street and B: Nowy Bieżanów tram balloon loop) shared similar levels of traffic noise which did not exceed the norm. A comparison of the level of traffic noise at the three research sites according to the day of the week and time of day showed that the level of noise was the highest on weekdays in the morning. During the weekend, the level of noise in the afternoon hours was higher than the value registered in the morning and evening hours. The lowest level of noise was registered at Teligi Street during the weekend in the evening hours, and the highest value was registered on the Piłsudski Bridge on weekdays in the morning hours.

Educational Implementation of a Sound Level Meter in the LabVIEW Environment

Barański R., Wszołek G.

Archives of Acoustics

2013

Vol. 38, No. 1

19--26

As a consequence of recent implementations of EU Directives related to noise protection more and more students of various AGH-UST programs are introduced to the basics of acoustic measurements. Students at various levels of theoretical background in the field of acoustic measurements are offered practical training in measurements using digital sound analyzers. The situation would be optimal if each student could have a device at his/her own disposal. Unfortunately, such a situation is not possible at the moment because of various reasons. With the above problem in mind, a dedicated software package has been developed, implemented in the LabVIEW environment, which allows detailed studies of problems related to the acoustic signal measurement using sound level meters, as well as tasks in spectral analysis (1/1 and 1/3 band filters) and narrow-band (FFT) analysis. With such organization during the introductory laboratory classes each student is offered a direct individual contact with a virtual device that is properly pre-programmed for realization of a well-constructed learning process. It definitely facilitates understanding of the essence of acoustic signal measurements and provides a good basis for further laboratory work carried out as a team-activity.