Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/80981
Type of publication: Straipsnis recenzuojamoje Lietuvos tarptautinės konferencijos medžiagoje / Article in peer-reviewed Lithuanian international conference proceedings (P1e)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Merkevičius, Stanislovas;Liegus, Minvydas;Jotautienė, Eglė;Eimutienė, Sigrida
Title: Investigation of Traffic Noise Flow in Living Areas
Is part of: Žmogaus ir gamtos sauga: tarptautinės mokslinės-praktinės konferencijos medžiaga: 2008 m. gegužės 14-17 d., birželio 12-13 d. D. 1. Akademija., 2008
Extent: p. 48-52
Date: 2008
Abstract: The society is aware of traffic noise and participates with local municipalities and cities in solving the noise problems. Positive economic indicators can be achieved when health is good. One of the important factors is restful sleep, which can be interrupted by traffic noise. The increased use of wind energy by windmills and various modes of transportation could increase the low frequency sound that could have a negative effect on the population. When humans are exposed to low frequency sound, only the high sound can be heard. The low intensity infrasonic sound could affect human health and induce various psychological disorders. The infrasonic sound could travel long distances and penetrate the openings in a welling occupied by humans and interrupt rest and sleep. The infrasonic measurements were performed using the Brüel & Kjær instrumentation. Components of infrasonic energy frequencies were obtained by calculating the difference between the averaged sound pressure level and the A-weighted sound pressure level. Aerodynamic turbulent noise propagations over ground are affected by diffraction from jaggedness and stress viscosity from secondary sound sources. The noise barriers are effective in the diffraction process by reducing noise to the living environment. Measurements were performed using acoustic barriers for traffic noise reduction in the suburbs. At 15 m from the highway, a 2 m high barrier was constructed and the measurements were taken at 15 m and 45 m from the barrier. More intensive sound diffraction observed at the measurement distance of 45 m. These observations indicate the importance of infrasonic diffraction and of the design of acoustic barriers for the reduction of low frequency noise
Internet: https://hdl.handle.net/20.500.12259/80981
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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