Uporaba diferencialnih mikrofonskih anten za kartiranje virov hrupa v okolju

Markič, Žan (author), Prezelj, Jurij (mentor)

Kartiranje hrupa v okolju se tipično izvaja z računalniškim modeliranjem. Pri tem se ocenjuje celoletno povprečje delovanja virov hrupa in pogojev širjenja hrupa v okolje. Meritev kart hrupa se ne izvaja zaradi potrebe po izjemno velikem številu merilnikov hrupa. Tako veliko število merilnikov hrupa je potrebno, ker imajo po le en mikrofon, ki zaznava hrup iz vseh smeri enakomerno. Postavimo lahko hipotezo, da z diferencialno mikrofonsko anteno lahko zaznamo smer, iz katere v posameznem trenutku prihaja hrup, in da z uporabo vsaj dveh diferencialnih mikrofonskih anten lahko določimo položaj vira hrupnega dogodka, s čimer lahko ocenimo zvočno moč hrupnemu dogodku in posledično izmerimo karto hrupa. V magistrskem delu bomo na izbrani lokaciji s pomočjo treh diferencialnih mikrofonskih anten prvi izmerili karto hrupa. Pri tem bomo ugotavljali, ali je primerneje uporabiti tri štirikanalne diferencialne antene, ki omogočajo detekcijo smeri vira hrupa, ali dve dvokanalni diferencialni anteni, ki omogočata določitev premice, na kateri vir hrupa leži. Izdelali bomo ustrezno programsko opremo za vizualizacijo izmerjenih kart hrupa.

• Language: Slovenian
• Keywords: Zvočno valovanje, Dominanten vir hrupa, Karta hrupa, Diferencialne mikrofonske antene, Imisija zvoka
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [Ž. Markovič]
• Year: 2022
• Number of pages: XXV, 79 str.
• PID: 20.500.12556/RUL-142755
• UDC: 534.6:53.083(043.2)
• COBISS.SI-ID: 138577923
• Publication date in RUL: 24.11.2022

MARKIČ, Žan, 2022, Uporaba diferencialnih mikrofonskih anten za kartiranje virov hrupa v okolju [online]. Master’s thesis. Ljubljana : Ž. Markovič. [Accessed 1 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=142755

Secondary language

• Language: English
• Title: Usage of differential microphone antennas for mapping source of environmental noise

Abstract

The mapping of environmental noise is typically done through computer modelling. During this, the annual average of the operation of noise sources and conditions of noise propagation into the environment is evaluated. The measurement of noise maps is not done due to the need for an extremely large number of noise level meters. Large number of noise level meters is necessary because they each have only one microphone, which detects noise equally from all directions. The hypothesis is that with a differential microphone antenna we could detect the direction from which the noise is coming from at a particular moment and that with the use of at least two differential microphone antennas we can determine the position of the source of noise, with which we can thus determine the sound power and subsequently measure the noise map. In the masters’ thesis, we will be the first to measure a noise map at a selected location with the help of three differential microphone antennas. Here, we will determine whether it is more appropriate to use three four-channel differential antennas that allow the detection of the direction of the noise source or two two-channel differential antennas that enable the determination of the line on which the noise source lies. We will also make the appropriate software that will enable the visualisation of the measured noise maps.

• Keywords: Sound waves, The most dominant source of noise, Mapping of environmental noise, Differential microphone antennas, Sound immission