Transmission of sound from air terminal devices through ceiling systems

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AuthorSearch for:
TypeArticle
Journal titleASHRAE Preprint
Volume4160
Pages18; # of pages: 8
SubjectAcoustics
AbstractSound from HVAC ducts or devices in ceiling plenums passes through the ceiling system to the room below and can cause annoyance to the occupants of the rooms. ARI Standard 885 provides a method to calculate the level of the sound in the room using the sound power of the device and some attenuation factors for the ceiling. The goal of ASHRAE research project RP-755 was to evaluate and extend the information given in ARI 885. This paper describes the attenuation factors found for six types of ceiling tiles and four air-terminal units. Attenuations at low frequencies were found to correlate with the area of the lower face of the device emitting sound. Sound fields in the room below were essentially uniform; no significant attenuation with distance was found.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
NotePresented at the 1998 ASHRAE Winter Meeting.
Peer reviewedYes
NRC number38768
7819
NPARC number20337903
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Record identifier890230f0-e86a-44a9-87b6-1bb22107f661
Record created2012-07-19
Record modified2016-05-09
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