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2 2023

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The use of sound-absorbing properties of acoustic panels with different degree of perforation on the outer lining layer in modeling and calculations of traffic noise

Żuchowski Rafał, Nowoświat Artur, Pudełko Bartłomiej, Dulak Leszek

Vibrations in Physical Systems

2023

Vol. 34, nr 2

art. no. 2023219

The article presents research studies on the impact of perforation of the outer lining layer of an acoustic panel used for the construction of road noise reduction devices on its absorbing properties. The research included measurements of the reverberation time in the laboratory conditions of diffusion field, on the basis of which the values of sound absorption coefficient as a function of frequency were determined. In addition, for various solutions of acoustic panels based on a corrugated fiber cement board on the top surface and on two types of mineral wool inside the panel, the αw and αp indices as well as sound absorption rating index DLαNRD were calculated. Then, computer simulations were carried out to show the influence of laboratory-determined acoustic parameters of the panels on the acoustic climate in the vicinity of a selected transport system. The key aspects of the modeling process are presented, the characteristics of the noise source and the analysis of the results are described. An important goal of traffic noise modeling is to strive to develop more friendly and sustainable material solutions that will reduce the negative effects of noise on people and the environment.

Analysis of the impact of the forecasted and measured traffic intensity on noise range

Pudełko Bartłomiej, Nowoświat Artur, Żuchowski Rafał

Vibrations in Physical Systems

2023

Vol. 34, nr 2

art. no. 2023217

The article presents the assumptions of traffic intensity for a selected road section, which have been verified on the basis of measurements and data provided from General Measurement of Traffic (GPR). On this basis, simulations of noise ranges were made in the SoundPlan program. The simulations were performed for both predicted and verified traffic. Such simulations in the form of acoustic maps were used to determine the impact of the discrepancy between the assumed traffic intensity and that verified by measurements on noise range and its impact on protected areas and building development in the nearest vicinity.