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Polytechnic University of Tirana Sheshi Nënë Tereza, , Tirana , Albania
Faculty of Mechanical Engineering Fakultetska 1, Zenica, University of Zenica , Zenica , Bosnia and Herzegovina
Technical Faculty "Mihajlo Pupin" Zrenjanin, University of Novi Sad , Novi Sad , Serbia
Urban environments are subject to various pollutions where, among other things, acoustic pollution. Consequently, the study of acoustic pollution is an issue that is addressed in several aspects: economic, political and scientific / research.
In this paper we propose a simulation model through the Matlab / Simulink software that shows the effect of eliminating the sound noise from a sample taken from the noisy urban environment in the city of Tirana, Albania.
The noisy signal is sampled near the city center of Tirana, during mid-day, when the acoustic pollution levels are expected to be relatively high. Further, the sample of the received signal is placed as an input on the simulation model. The simulation model in question consisted in standard Quadrature Amplitude Modulation (QAM) algorithm and was considered to eliminate the signal noise that is input to this algorithm; the output expectancy is noise output minimized by about 80% of the noise at the input signal.
The outputs generated by this model meet the expectations and is consistent with the performance of the algorithm in question. The noise minimization through the standard QAM algorithm is up to 78.3% of noise elimination from the sampling signal. However, the limitations of this proposal include minimization that can be improved in higher percentages of the noise signals through other QAM modulation constellations such as: 16-QAM, 32-QAM, 64-QAM, etc. This proposal intends to serve as model for analytical studies of acoustic pollution for taking objective politics in reducing the level of acoustic pollution in urban environments.
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