Approaches for estimating flanking transmission for heavy impact sources

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ConferenceInter-Noise 2010: 13 June 2010, Lisbon, Portugal
Pages110; # of pages: 10
SubjectBuilding acoustics, wood frame, impact sound, flanking transmission; Floors
AbstractFlanking transmission exists in all buildings and its importance relative to direct transmission is determined by the quality of the acoustical design. The ISO 10848 standard has been created to provide estimates flanking transmission from airborne and the ISO tapping machine. Currently this method is unproven for impact flanking transmission at low frequencies, especially from heavy/soft impact sources like the ?bang machine? and ?rubber ball? impact sources. This paper assesses three methods. The first and straight forward method obtains results by suppressing all transmission paths except for the one(s) of interest. The second obtains results by using two sets of data (one including the transmission path(s) of interest and the other not) and indirectly assigning the change in transmitted sound power to the path(s) suppressed. The third, a new approach, is presented that is found to be considerably more accurate and easier to apply when flanking elements and junction are symmetric. Results for the various approaches are presented when applied to wood-frame construction, and limitations of each approach are discussed.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number53565
NPARC number20374979
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Record identifier2cb767ce-6412-46b6-a3da-d640940e38df
Record created2012-07-23
Record modified2016-05-09
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