Investigating the absorption characteristics of open ceilings in multi-purpose halls using a 1:25 scale model

Yong Hee Kim, Hye Mi Lee, Chun Ki Seo, Jin Yong Jeon

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This paper investigated the absorption coefficients of acoustically transparent ceilings using 1:25 scale models. From a field survey of 18 existing halls, it was found that the open ceilings were equipped with steel truss structures, ducts, catwalks and ceiling surfaces. In order to investigate the absorption characteristics of the equipped ceilings, measurements were made using a 1:25 reverberation chamber based on ISO 354. Results showed that for an empty ceiling with a depth of 6 m, the absorption coefficient with a 50%-perforated ceiling surface is 0.2-0.3 above 500 Hz. If there were steel structures inside the ceiling, the absorption coefficient increased by 0.1 at 125 Hz to 2 kHz. Adding ducts and catwalks increased the absorption by 1-2 kHz. The absorption coefficients of the equipped ceilings ranged from 0.19 to 0.61 and the absorption characteristics were mainly found at high frequencies. Maximum absorption was observed in heavily equipped ceiling structures.

Original languageEnglish
Pages (from-to)473-478
Number of pages6
JournalApplied Acoustics
Volume71
Issue number5
DOIs
StatePublished - 2010 May 1

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ceilings
scale models
absorptivity
ducts
steel structures
reverberation chambers
steels

Keywords

  • Absorption coefficient
  • Multi-purpose hall
  • Open ceiling
  • Scale model

Cite this

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title = "Investigating the absorption characteristics of open ceilings in multi-purpose halls using a 1:25 scale model",
abstract = "This paper investigated the absorption coefficients of acoustically transparent ceilings using 1:25 scale models. From a field survey of 18 existing halls, it was found that the open ceilings were equipped with steel truss structures, ducts, catwalks and ceiling surfaces. In order to investigate the absorption characteristics of the equipped ceilings, measurements were made using a 1:25 reverberation chamber based on ISO 354. Results showed that for an empty ceiling with a depth of 6 m, the absorption coefficient with a 50{\%}-perforated ceiling surface is 0.2-0.3 above 500 Hz. If there were steel structures inside the ceiling, the absorption coefficient increased by 0.1 at 125 Hz to 2 kHz. Adding ducts and catwalks increased the absorption by 1-2 kHz. The absorption coefficients of the equipped ceilings ranged from 0.19 to 0.61 and the absorption characteristics were mainly found at high frequencies. Maximum absorption was observed in heavily equipped ceiling structures.",
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Investigating the absorption characteristics of open ceilings in multi-purpose halls using a 1:25 scale model. / Kim, Yong Hee; Lee, Hye Mi; Seo, Chun Ki; Jeon, Jin Yong.

In: Applied Acoustics, Vol. 71, No. 5, 01.05.2010, p. 473-478.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Kim, Yong Hee

AU - Lee, Hye Mi

AU - Seo, Chun Ki

AU - Jeon, Jin Yong

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