Influence of velocity on the frequency spectra of SMA 11 road surface measured by CPX method

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44994575%3A_____%2F25%3A10002445" target="_blank" >RIV/44994575:_____/25:10002445 - isvavai.cz</a>
Result on the web
<a href="https://online.obd.cz/id_publ/2447" target="_blank" >https://online.obd.cz/id_publ/2447</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Influence of velocity on the frequency spectra of SMA 11 road surface measured by CPX method
Original language description
Noise affects the health of the citizens. Its primary source is transport, especially road transport. Road noise is primarily caused by the vehicle's combustion engine, the contact of the tyre with the road surface, and airflow around the vehicle (depending on the vehicle's velocity). In cities, the most common noise is noise generated by the contact between the tyre and road surface, so-called tyre/road noise. The close-proximity (CPX) method is one of the most objective ways of measuring road surface noise. It uses microphones mounted near the reference tyre so the surrounding environment can't affect the measured noise values.This paper presents the results from measurements of the reference asphalt surface using the CPX method at the different velocities using all six microphones. The third-octave band spectra for individual microphones were analyzed. The highest differences in trend lines are achieved at frequencies below 1000 Hz. The most significant differences of up to 5.8 dB(A) between the noise spectra values of individual microphones were found at the highest measured velocity for low frequencies.
Czech name
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Czech description
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Project
<a href="/en/project/CK04000058" target="_blank" >CK04000058: Consideration of other influences reflected in the measured noise values of pavement surfaces in dynamic measurement</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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