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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F07%3A00131483%21RIV15-MSM-21220___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
The present contribution introduces a method of calculation of linear sources with non-linear distribution of radiation of sound energy. In practical circumstances we often meet sources the structures of which approach those of current HVAC ducts but with dimensions and mode of radiation completely different. Concerned are light stacks of factories, refuse incinerating plants, etc. The core of the problem is that a stack must be considered as a linear source where sound power is radiated in two parts. The first at the top of the stack (point source) and the second, considerably greater, by the outer surface of the stack (linear source). Sound power, however, is radiated by the outer surface of the stack in a non-linear mode and drops from the flue gas inlet to the top of the stack. In projects it is therefore very difficult to predict how must a stack radiate sound energy in order to prevent exceeding hygienically permissible limits. The present contribution introduces a method of calculation of linear sources with non-linear distribution of radiation of sound energy. In practical circumstances we often meet sources the structures of which approach those of current HVAC ducts but with dimensions and mode of radiation completely different. Concerned are light stacks of factories, refuse incinerating plants, etc. The core of the problem is that a stack must be considered as a linear source where sound power is radiated in two parts. The first at the top of the stack (point source) and the second, considerably greater, by the outer surface of the stack (linear source). Sound power, however, is radiated by the outer surface of the stack in a non-linear mode and drops from the flue gas inlet to the top of the stack. In projects it is therefore very difficult to predict how must a stack radiate sound energy in order to prevent exceeding hygienically permissible limits.
dcterms:title
Linear Sources with Non-Linear Distribution of Soung Energy Linear Sources with Non-Linear Distribution of Soung Energy
skos:prefLabel
Linear Sources with Non-Linear Distribution of Soung Energy Linear Sources with Non-Linear Distribution of Soung Energy
skos:notation
RIV/68407700:21220/07:00131483!RIV15-MSM-21220___
n3:aktivita
n17:Z
n3:aktivity
Z(MSM6840770011)
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n5:4724925 n5:5730112 n5:3175375
n3:druhVysledku
n21:D
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
431123
n3:idVysledku
RIV/68407700:21220/07:00131483
n3:jazykVysledku
n7:eng
n3:klicovaSlova
Noise of HVAC equipment; Stack; Non-lineer emitter; Duct acoustics
n3:klicoveSlovo
n9:Duct%20acoustics n9:Non-lineer%20emitter n9:Stack n9:Noise%20of%20HVAC%20equipment
n3:kontrolniKodProRIV
[BDE5FBBC5AE2]
n3:mistoKonaniAkce
Queensland
n3:mistoVydani
Auburn
n3:nazevZdroje
14th International Congress on Sound and Vibration
n3:obor
n6:JE
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n13:2007
n3:tvurceVysledku
Nový, Richard Kučera, Miroslav Bašta, Jiří
n3:typAkce
n16:WRD
n3:zahajeniAkce
2007-07-09+02:00
n3:zamer
n12:MSM6840770011
s:numberOfPages
8
n20:hasPublisher
IIAV - International Institute of Acoustics and Vibration
n19:isbn
978-0-7334-2516-5
n10:organizacniJednotka
21220