Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
An Initial Study on Applying Active Noise Control to an Insulated Box Fan Used in Ventilation System Applications
Show others and affiliations
Responsible organisation
2009 (English)Conference paper, Published paper (Refereed) 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.

Place, publisher, year, edition, pages
Krakow, 2009.
Keyword [en]
Fan noise, adaptive signal processing, ANC, turbulence, active noise control, measurement noise
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-8041Local ID: oai:bth.se:forskinfoD495FAB8977132EDC12575ED0036B7BDOAI: oai:DiVA.org:bth-8041DiVA: diva2:835725
Conference
The Sixteenth International Conference on Sound and Vibration, ICSV 16
Available from: 2012-09-18 Created: 2009-07-08 Last updated: 2015-06-30Bibliographically approved

Open Access in DiVA

fulltext(878 kB)47 downloads
File information
File name FULLTEXT01.pdfFile size 878 kBChecksum SHA-512
4efbdf9030133e788d306ee0d871ea79502b1c07fe906cfb36e597a37f20b7d2aa7e4ba2ca11c2f0c8ff6e5ac7a0d31c7145604f9eecb741a223f609ea2d1a59
Type fulltextMimetype application/pdf

Authority records BETA

Johansson, SvenHåkansson, Lars

Search in DiVA

By author/editor
Johansson, SvenHåkansson, Lars
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 47 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 43 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf