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Natural Science Forum / Physics / Acoustics / December 2004Transmission Loss Data
I was wondering what sources of information other's here use for TL data. I know several software programs come with databases. I have also seen the USG Acoustician Binder (50+ gypsum construction tests from Riverbank), Saflex/Monsanto Binder (many window tests, mostly laminated) and a few tests here and there from Kinetics (floor/ceiling stuff). >I was wondering what sources of information other's here use for TL > data. I know several software programs come with databases. I have > also seen the USG Acoustician Binder (50+ gypsum construction tests > from Riverbank), Saflex/Monsanto Binder (many window tests, mostly > laminated) and a few tests here and there from Kinetics (floor/ceiling > stuff). You basically have to search and find all the data you can. The state of California publishes a data base mostly older data that you can find on the web if you search. The Institute for Research in Construction of the NRC of Canada has a large data base of measurements they have made. > I was wondering what sources of information other's here use for TL > data. I know several software programs come with databases. I have > also seen the USG Acoustician Binder (50+ gypsum construction tests > from Riverbank), Saflex/Monsanto Binder (many window tests, mostly > laminated) and a few tests here and there from Kinetics (floor/ceiling > stuff). In the www.studiotips.com forum or the John Sayers forum are links to several PDF files containing drawings and 1/3 oct.data of hundreds of constructions. Bert >> I was wondering what sources of information other's here use for TL >> data. Also British Gypsum publish ratings and will on request provide lab tests (usually 1/3 octave) of many drywall constructions. Pilkington Glass and other glass companies publish data for various types and combinations of glass. Tony W perhaps the best resource for publicly available data on transmission loss is, as Noral Stewart commented, Canada's National Research Council www.nrc.ca some specific links: (350 examples of walls): http://irc.nrc-cnrc.gc.ca/fulltext/ir761/ (hundreds of examples floors/ceilings): http://irc.nrc-cnrc.gc.ca/fulltext/ir811/ adding cavities in front of concrete block: http://irc.nrc-cnrc.gc.ca/fulltext/ir586.pdf there are literally dozens of studies you will probably find useful, covering topics from the above to flanking sound, to discussions of the measurement procedures, and everything in between. take care, Brian Wow! I was aware of the NRC, but would never have found those reports. Thanks! > perhaps the best resource for publicly available data on transmission > loss is, as Noral Stewart commented, Canada's National Research [quoted text clipped - 18 lines] > > Brian this one http://irc.nrc-cnrc.gc.ca/fulltext/ir818/ deals directly with outdoor to indoor constructions, has another 100+ full sets of TL data and includes a variety of window assemblies :) may be of particular interest in some cases, i forgot to mention it previously that site - www.nrc.ca - is just a gift. there are studies of nearly everything that one could ever want to read about, from the theoretical modeling of flanking sound to probably 1000+ full TL sets, to specific studies on outdoor-indoor noise, to studies on the nature of measuring impact noise in floors and the flaws of the current system to this and to that and... and, well, i guess they've jsut laid a better foundation for understanding of the basic principles of walls than was before. Brian |
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