I.V.Vovk, V.T.Grinchenko, V.T.Matsypura Soundproof properties of the barriers located along the city street |
Acoustic bulletin, Vol. 15 ¹ 2, (2012) |
| The paper deals with studying the properties of soundproof barriers placed at sidewalk edges the along both sides of a city street with tall buildings. Traffic noise was modeled by a sound source in the form of endless pulsating band located on the roadway. The barriers with the acoustically hard and sound-absorbing walls are considered. An average pressure on the windows of buildings is selected as a criterion for characterizing the properties of soundproof barriers. Typical occurrence of numerous resonance phenomena in the regions between the barriers, between the buildings, as well as between the barriers and buildings is shown for the barriers with the acoustically hard surfaces. Thus, the installation of the hard barriers does not lead to significant increasing of soundproof for the windows and sidewalk zones. In contrast, when using the barriers with sound-absorbing surfaces, the resonance phenomena are attenuated that significantly improves the soundproofing of the mentioned zones. |
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KEY WORDS: noise barrier, soundproof, impedance, the Helholtz resonator, method of partial domains |
| TEXT LANGUAGE: Russian |