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Approaches to Evaluating the Quality of Masking Noise Interference

Smailov Nurzhigit, Batyrgaliev Askhat, Akhmediyarova Ainur, Seilova Nurgul, Koshkinbayeva Madina, Baigulbayeva Moldir, Romaniuk Ryszard, Orunbekov Maxat, Assem Kabdoldina, Kotyra Andrzej

International Journal of Electronics and Telecommunications

2021

Vol. 67, No. 1

59--64

The paper discusses the characteristics of spatial electromagnetic noise generators, as well as the formation of a broadband noise signal. A number of well-known methods for assessing the quality of masking noise interference and the approaches used in them have been described. Approaches to the measurement of masking noise were also determined in assessing their quality. In conclusion, additional methods are proposed for assessing the quality of masking noises, such as searching for correlation of noise in different frequency sub-bands and using statistical and (or) graphical methods (tests) for randomness.

Analysis of Acoustic Environment on Premises of Nursery Schools in Wrocław

Rudno-Rudzińska B., Czajkowska K.

Archives of Acoustics

2010

Vol. 35, No. 2

245-252

The aim of this project was to create a ranking of the nursery schools in Wrocław with regard to the quality of the acoustic environment on their premises, using a specially developed evaluation methodology. Each nursery school was rated according to an adopted grading scale on the basis of the noise level distribution on the playground and on the nursery school building facades. Using the grading scale one can classify nursery school premises into twelve categories characterized by different acoustic environment quality, from exceptionally good (< 45 dB) to exceptionally bad (> 70 dB). The appropriately rescaled data from the acoustic map of Wrocław and the authors’ own measurements and simulation analyses were used. The developed methodology was verified by comparing the ratings yielded by it with those determined on the basis of field measurements and simulation studies, carried out for several selected nursery schools. The paper presents the results of an acoustic environment quality assessment carried out, using the developed investigative methodology, for 118 nursery schools located in Wrocław.