RC LF TL
Posted: Tue Aug 24, 2004 1:11 pm
How is that for a cryptic subject title?
The data is from IR-761
http://irc.nrc-cnrc.gc.ca/fulltext/ir761/
These are all the comparisons I could figure where the only change is the RC. "Page" refers to the PDF page number. The last column is the arithmetic average of the TL change from 40 to 80 Hz. Numbers in brackets are negative. I chose the 80 Hz as the upper limit as that is the lower limit of guitar and human bass voice.
Of the eight comparisons, only one has better LF TL.
The data is from IR-761
http://irc.nrc-cnrc.gc.ca/fulltext/ir761/
These are all the comparisons I could figure where the only change is the RC. "Page" refers to the PDF page number. The last column is the arithmetic average of the TL change from 40 to 80 Hz. Numbers in brackets are negative. I chose the 80 Hz as the upper limit as that is the lower limit of guitar and human bass voice.
Of the eight comparisons, only one has better LF TL.
Code: Select all
Wall Design
Page RC Stud 50 63 80 100 125 STC 40-80 Hz Ave.
Single 13 mm gypsum each side, 406 mm stud spacing, mw.
22 no wood 20.1 16.7 20.5 14.1 8.6 33.0
163 yes wood 18.9 15.0 18.9 15.1 15.6 40.0
Change (1.2) (1.7) (1.6) 1.0 7.0 7.0 (1.5)
Single 13 mm type x gypsum each side, 406 mm stud spacing, gf
31 no steel 19.6 15.0 17.8 10.8 10.9 35.0
233 yes steel 15.5 10.1 16.1 17.8 24.0 48.0
Change (4.1) (4.9) (1.7) 7.0 13.1 13.0 (3.6)
Single 16 mm type x gypsum each side, 406 mm stud spacing, mw.
24 no wood 22.3 18.5 23.2 18.1 13.0 34.0
179 yes wood 20.6 14.7 18.6 18.1 21.7 46.0
Change (1.7) (3.8) (4.6) 0.0 8.7 12.0 (3.4)
Single 16 mm type x gypsum each side, 406 mm stud spacing, gf.
55 no steel 19.8 14.5 16.3 11.2 15.1 39.0
236 yes steel 16.1 10.2 15.9 19.1 25.4 49.0
Change (3.7) (4.3) (0.4) 7.9 10.3 10.0 (2.8)
Double 13 mm type x gypsum each side, 406 mm stud spacing, blown cellulose.
28 no wood 26.8 23.1 26.2 20.9 15.4 38.0
217 yes wood 23.7 16.7 22.3 23.3 30.1 54.0
Change (3.1) (6.4) (3.9) 2.4 14.7 16.0 (4.5)
Single/double 13 mm type x gypsum, 406 mm stud spacing, mf.
26 no wood 21.8 19.0 23.2 16.2 11.5 35.0
203 yes wood 21.0 15.3 19.7 18.7 21.5 46.0
Change (0.8) (3.7) (3.5) 2.5 10.0 11.0 (2.7)
Single/double 13 mm type x gypsum, 406 mm stud spacing, mf.
93 no steel 24.0 17.1 18.2 13.5 18.2 42.0
241 yes steel 18.5 11.2 17.5 22.6 29.8 54.0
Change (5.5) (5.9) (0.7) 9.1 11.6 12.0 (4.0)
Staggered stud, double 16 mm type x gypsum each side, 406 mm stud spacing, gf.
298 no wood 21.4 20.6 24.7 31.9 34.0 56.0
312 yes wood 20.0 21.9 28.9 35.8 37.9 62.0
Change (1.4) 1.3 4.2 3.9 3.9 6.0 1.4