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NC-v4 EQc9: Acoustic performance
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Sound transmission - STC vs Rw
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Ken Shook
PartnerLongman Lindsey
LEEDuser Expert
5 thumbs up
February 15, 2018 - 5:44 pm
The STC rating is typically very similar to Rw but they are not always exactly equivalent. When faced with this issue in the past we have calculated the STC rating from the 1/3-octave transmission loss data from which the Rw is calculated, then submitted the STC data for LEED.
Anastasia Makarenko
EcoStandard14 thumbs up
April 18, 2018 - 11:38 am
Dear Ken, could you please share with us more details about calculating STC rating from Rw value? I can't find any info regarding this anywhere...
Ken Shook
PartnerLongman Lindsey
LEEDuser Expert
5 thumbs up
April 24, 2018 - 9:37 am
Hi Anastasia, the calculation procedure for calculating STC is outlined in ASTM E-413 (https://www.astm.org/Standards/E413.htm). You will need to obtain the 1/3-octave band transmission loss data that was used to calculate the Rw. Once you have this follow the procedure outlined in the standard to determine the STC rating.