Using scale modeling to assess heating and air conditioning duct attenuation

Kangping Ruan, David W. Herrin

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

Scale modeling rules are summarized for assessing the attenuation of heating, ventilation, and air conditioning ducts. A standard scaling approach is applied where the frequency ratio is inversely proportional to the size ratio. Scaling rules for sound absorption and breakout noise transmission are also developed. The scaling approach is first tested virtually via finite element analysis to validate the concept. This is followed by an experimental case where a small expansion chamber, similar to a plenum, and its corresponding scale model are measured. Scale model results agree with full scale measurements for both insertion loss and breakout transmission loss.

Original languageEnglish
StatePublished - 2017
Event46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 - Hong Kong, China
Duration: Aug 27 2017Aug 30 2017

Conference

Conference46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017
Country/TerritoryChina
CityHong Kong
Period8/27/178/30/17

Bibliographical note

Publisher Copyright:
© 2017 Institute of Noise Control Engineering. All rights reserved.

Keywords

  • HVAC ducts I-INCE classification of subjects number: 37, 51
  • Scale modeling

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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