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Michael Chusid, RA FCSI CCS Senior Member Username: michael_chusid
Post Number: 440 Registered: 10-2003
| Posted on Friday, November 16, 2018 - 07:24 pm: | |
Are any of you using SAA instead of NRC? Should a manufacturer catalog list both? Has the change in calculation method, from NRC to SAA, in ASTM C423 improved construction? Michael Chusid, RA FCSI CCS 1-818-219-4937 www.chusid.com www.buildingproduct.guru |
Guest (Unregistered Guest) Unregistered guest
| Posted on Friday, November 16, 2018 - 07:45 pm: | |
Regardless, shouldn't you be specifying what the project requires? Whether it's an SAA, NRC, or other rating? |
Michael Chusid, RA FCSI CCS Senior Member Username: michael_chusid
Post Number: 441 Registered: 10-2003
| Posted on Saturday, November 17, 2018 - 09:37 am: | |
Dear Guest: What the project requires, presumably, is noise reduction. Both SAA and NRC are numerical values describing the noise reduction properties of a material. For a century, NRC reigned as the standard descriptor. To simplify, it was based on measurements at FOUR frequencies. SAA is based on measurements at TWELVE frequencies across a slightly wider spectrum. Presumably SAA is a refined tool that will lead to more precise acoustic engineering. I am writing an article for Construction Specifier and am asking for insight regarding the adoption of the new standard. Michael Chusid, RA FCSI CCS 1-818-219-4937 www.chusid.com www.buildingproduct.guru |
Chris Grimm, CSI, CCS, SCIP, LEED AP BD+C Senior Member Username: chris_grimm_ccs_scip
Post Number: 449 Registered: 02-2014
| Posted on Wednesday, December 05, 2018 - 01:24 pm: | |
So far, I have not seen SAA used in specifications. It does sound (no pun intended) like a good development though! |
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