Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
An Initial Study on Applying Active Noise Control to an Insulated Box Fan Used in Ventilation System Applications
Visa övriga samt affilieringar
Ansvarig organisation
2009 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat) Published
Abstract [en]

In many different applications and buildings fans are used to remove unwanted and used air. These fans often generate broadband and tonal noise. Commonly, passive resistive silencers are used to attenuate noise generated by different types of fans installed in ventilation systems. Passive silencers tend to become bulky and impractical when designed for low frequency attenuation. However, active noise control (ANC) is a technique known for its ability to produce high levels of attenuation in the low frequency range, even with a relatively moderate sized ANC system. This paper presents an initial study performed to investigate the possibilities of applying ANC to a radial fan installed inside a box, an insulated box fan. The box is connected to a duct system and can for example be used as a waste air fan. The primary interest in this application, when the fan is used as a waste air fan, is to attenuate the noise generated on the suction side, since that side generates noise into a particular room. Investigations were carried out to determine where the ANC system should be installed, e.g. inside the box, in the duct connected to the box etc. Factors considered were for example, turbulence, standing waves, the type of noise generated by the fan (tonal, broadband, or a combination), and space limitations. The noise generated by the fan was found to be dominated by a tonal component, but also to have broadband energy in the low frequency range. Further, a feedforward ANC system was applied on the suction side, producing approximately 28 dB attenuation of the tonal component, and 5-10 dB attenuation of the broadband noise between 50 and 200 Hz.

Ort, förlag, år, upplaga, sidor
Krakow, 2009.
Nyckelord [en]
Fan noise, adaptive signal processing, ANC, turbulence, active noise control, measurement noise
Nationell ämneskategori
Signalbehandling
Identifikatorer
URN: urn:nbn:se:bth-8041Lokalt ID: oai:bth.se:forskinfoD495FAB8977132EDC12575ED0036B7BDOAI: oai:DiVA.org:bth-8041DiVA, id: diva2:835725
Konferens
The Sixteenth International Conference on Sound and Vibration, ICSV 16
Tillgänglig från: 2012-09-18 Skapad: 2009-07-08 Senast uppdaterad: 2015-06-30Bibliografiskt granskad

Open Access i DiVA

fulltext(878 kB)74 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 878 kBChecksumma SHA-512
4efbdf9030133e788d306ee0d871ea79502b1c07fe906cfb36e597a37f20b7d2aa7e4ba2ca11c2f0c8ff6e5ac7a0d31c7145604f9eecb741a223f609ea2d1a59
Typ fulltextMimetyp application/pdf

Personposter BETA

Johansson, SvenHåkansson, Lars

Sök vidare i DiVA

Av författaren/redaktören
Johansson, SvenHåkansson, Lars
Signalbehandling

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 74 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 77 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf