Sound transmission of cavity walls due to structure borne transmission via point and line connections.
The author has published equations for predicting the air borne sound transmission of double leaf cavity walls due to the structure borne sound transmission across the air cavity via (possibly resilient) line connections, but has never published the full derivation of these equations. The author also derived equations for the case when the connections are rigid point connections but has never used them or published them or their derivations. This paper will present the full derivation of the author's theory of the air borne sound transmission of double leaf cavity walls due to the structure borne sound transmission across the air cavity via point or line connections which are modeled as four pole networks. The theoretical results will be compared with experimental results on wooden stud cavity walls from the National Research Council of Canada because the screw spacing is given for these results. This enables connections via studs and screws to be modeled as point connections and avoids the need to make any assumptions about the compliance of the equivalent point or line connections.
School of Applied Sciences, Royal Melbourne Institute of Technology, GPO Box 2476V Melbourne, Victoria 3001, Australia. john.davy@rmit.edu.au
John L
JL
Davy
D000042:Absorption; D000162:Acoustics / Q000295:instrumentation*; D000388:Air; D002133:Calcium Sulfate; D003252:Construction Materials; D004867:Equipment Design; D005160:Facility Design and Construction / Q000295:instrumentation*; D008962:Models, Theoretical; D009038:Motion; D009622:Noise / Q000517:prevention & control; D011312:Pressure; D013016:Sound; D013997:Time Factors; D014934:Wood
D002133:Calcium Sulfate