Aktivno izničevanje prometnega hrupa

diplomska naloga

Primož Vraničar (Author), Tomaž Maher (Mentor), Jure Kostanjšek (Thesis defence commission member), Peter Lipar (Thesis defence commission member), Tomo Cerovšek (Thesis defence commission member)

Abstract

Keywords

zvok;izničevanje zvoka;promet;decibel

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[P. Vraničar]
UDC:	534.836:651.5(043.2)
COBISS:	5979489
Views:	2838
Downloads:	452
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Active road noise reduction
Secondary abstract:	Theoretical principle of noise cancellation can be realized in the ideal studio conditions, but when the experiment is put into actual space and realized, we can see that the sound only partly cancels itself, on some frequencies more and on some less. However, in construction engineering we are not only dealing with certain frequencies but with frequency spectrums, if not with the whole frequency field. It is relatively hard to control the noise in traffic. We are dealing with a larger frequency spectrum or field. In my thesis I studied the theoretical basis of sound cancellation and compared it to the results I gained in an experiment in my home studio and in the field. In conclusion I presented an example of a combined noise barrier, which partly physically reduces noise and with an active anti noise system. In construction engineering the sound is known as a product of a structure under construction, or a structure already in use. In general, construction engineering mostly deals with the sound that bothers inhabitants in the vicinity of, or in the structure itself. Such sound that has negative effects on people is called noise. Until recently, most of the attention in preventing noise was dedicated to physical obstacles, like noise barriers. At the same time, a theory was developed by the science of sound that noise can be prevented by cancelling it out by itself. This is called active noise cancellation.
Secondary keywords:	Sound;noise cancellation;traffic;comparison;decibel
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XII, 52 str., 31 str. pril.
Type (ePrints):	thesis
Title (ePrints):	Active road noise reduction
Keywords (ePrints):	zvok;izničevanje zvoka;promet;decibel
Keywords (ePrints, secondary language):	Sound;noise cancellation;traffic;comparison;decibel
Abstract (ePrints):	V gradbeništvu poznamo zvok kot proizvod objekta v gradnji ali pa objekta v sami uporabi. V splošnem se v gradbeništvu največ ukvarja z zvokom, kateri moti prebivalce, ki so v neposredni bližini ali pa v samem objektu. Takšen zvok, ki ima negativni vpliv na osebe, imenujemo hrup. Do pred kratim smo pri preprečevanju hrupa posvečali največjo pozornost fizičnim oviram, kot so protihrupne ograje in podobno, vzporedno pa je znanost zvoka razvila teorijo, da lahko hrup preprečimo tako, da zvok izničujemo s samim seboj. Takemu načinu pravimo aktivno izničevanje zvoka. Teoretično načelo izničevanja zvoka drži v idealnih pogojih studia, ampak ko preizkus prenesemo v prostor in realiziramo opazimo, da se zvok izničuje le deloma in to na določenih frekvencah bolj, na določenih frekvencah pa manj. V gradbeništvu pa v celoti nimamo opravka z določenimi frekvencami, ampak bolj spektri frekvenc, če ne celotnim frekvenčnim območjem. V prometu je hrup relativno težko nadzorovati. Imamo opravka z večjim spektrom oziroma območjem frekvenc. V diplomski nalogi sem preučil teoretično podlago izničevanja zvoka in jo primerjal z rezultati, katere sem pridobil v preizkusu v domačem studiu in na terenu. V zaključku sem zastavil podobo kombinacijske protihrupne ograje, ki delno fizično zmanjšuje hrup in delno z aktivnim protihrupnim sistemom.
Abstract (ePrints, secondary language):	Theoretical principle of noise cancellation can be realized in the ideal studio conditions, but when the experiment is put into actual space and realized, we can see that the sound only partly cancels itself, on some frequencies more and on some less. However, in construction engineering we are not only dealing with certain frequencies but with frequency spectrums, if not with the whole frequency field. It is relatively hard to control the noise in traffic. We are dealing with a larger frequency spectrum or field. In my thesis I studied the theoretical basis of sound cancellation and compared it to the results I gained in an experiment in my home studio and in the field. In conclusion I presented an example of a combined noise barrier, which partly physically reduces noise and with an active anti noise system. In construction engineering the sound is known as a product of a structure under construction, or a structure already in use. In general, construction engineering mostly deals with the sound that bothers inhabitants in the vicinity of, or in the structure itself. Such sound that has negative effects on people is called noise. Until recently, most of the attention in preventing noise was dedicated to physical obstacles, like noise barriers. At the same time, a theory was developed by the science of sound that noise can be prevented by cancelling it out by itself. This is called active noise cancellation.
Keywords (ePrints, secondary language):	Sound;noise cancellation;traffic;comparison;decibel
ID:	8312535