some density / absorption coefficient information

[Brian Dayton]

for 1" batts 125 250 500 1000 2000 4000
4pcf 0.06 0.24 0.58 0.81 0.85 0.90
6 pcf 0.07 0.24 0.62 0.87 0.91 0.91
8 pcf 0.10 0.37 0.82 0.97 0.91 0.89
12 pcf 0.09 0.31 0.77 0.96 0.99 0.94

for 2" batts 125 250 500 1000 2000 4000
4pcf 0.24 0.68 1.08 0.99 0.92 0.92
6 pcf 0.32 0.81 1.09 1.02 0.94 0.94
8 pcf 0.35 0.84 1.04 0.96 0.93 0.93
12 pcf 0.40 0.79 0.94 0.94 0.87 0.87

for 4" batts 125 250 500 1000 2000 4000
2.5 pcf 0.63 1.15 1.15 1.05 1.05 0.94
4 pcf 0.77 1.14 1.15 1.04 1.04 0.94
6 pcf 0.84 1.11 1.11 1.05 1.05 0.93


from USG, for Thermafiber,taken at Riverbank in 1979


came across this today

[Bob]

http://www.bobgolds.com/AbsorptionCoefficients.htm
updated. Thank's Brian.

[Brian Dayton]

there was also a bunch of TL data for just the fiberglass/mineral fiber as well.  kind of interesting.

i wonder if TL of glass/wool would relate to absorption via impedance tube?

[avare]

Trying to be helpful;
Andre

[Ido]

there was also a bunch of TL data for just the fiberglass/mineral fiber as well.  kind of interesting.

heya Brian, any public link to that? interesting indeed.
Ido

[Brian Dayton]

there was also a bunch of TL data for just the fiberglass/mineral fiber as well.  kind of interesting.

heya Brian, any public link to that? interesting indeed.
Ido

Sorry, ldo, i somehow didn't see this post.

here is the data:

A B C D E
125 3 4 5 7 9
160 4 6 6 7 10
200 3 5 5 7 10
250 3 5 5 8 11
315 4 6 6 9 12
400 5 7 6 10 13
500 5 8 7 11 16
630 5 9 8 13 18
800 6 9 9 14 20
1000 5 10 9 15 21
1250 7 11 11 17 24
1600 7 12 12 18 26
2000 7 13 12 19 28
2500 7 15 14 21 31
3150 7 16 15 22 33
4000 10 19 18 26 37
5000 11 19 19 28 38

A = 3.5" 0.7 pcf glass fiber
B = 6" 0.7 pcfglass fiber
C = 3" 2.8 pcf thermafiber
D = 6" 2.8 pcf thermafiber
E = 5.5" 4.3 pcf thermafiber


And that's what i've got

[Ido]

thanks Brian.

check out the following OT excerpt, kinda though you'd like it.
it's from "the international wildlife encyclopedia" , 1969  (20 volumes !) .
same source that called the turkey ugly  :D .

[Scott R. Foster]

these are cool

http://www.geocities.com/SouthBeach/Mar ... dazzle.htm

[Ido]

these are cool

http://www.geocities.com/SouthBeach/Mar ... dazzle.htm

amazing.  
like someone went back in time and done that.

[Ido]

while we're on such matters:

(*humor follows, to quote one true Canadian)

here's a pic of the first studiotips annual parade, 1st  anniversary:


(source: http://www.co.yamhill.or.us/pics/McMinn ... te1916.jpg)

[J.F.Oros]

Looks more like StudioTits Parade to me. That driver must be Eric in his prime, and I bet he is still using that car, when is not driving his bicycle  :mrgreen:

[Brian Dayton]

there was also a bunch of TL data for just the fiberglass/mineral fiber as well.  kind of interesting.

heya Brian, any public link to that? interesting indeed.
Ido

Sorry, ldo, i somehow didn't see this post.

here is the data:

A B C D E
125 3 4 5 7 9
160 4 6 6 7 10
200 3 5 5 7 10
250 3 5 5 8 11
315 4 6 6 9 12
400 5 7 6 10 13
500 5 8 7 11 16
630 5 9 8 13 18
800 6 9 9 14 20
1000 5 10 9 15 21
1250 7 11 11 17 24
1600 7 12 12 18 26
2000 7 13 12 19 28
2500 7 15 14 21 31
3150 7 16 15 22 33
4000 10 19 18 26 37
5000 11 19 19 28 38

A = 3.5" 0.7 pcf glass fiber
B = 6" 0.7 pcfglass fiber
C = 3" 2.8 pcf thermafiber
D = 6" 2.8 pcf thermafiber
E = 5.5" 4.3 pcf thermafiber


And that's what i've got

bump.


this could be helpful and related to the recent triple leaf tests.   it shows that insulation itself has some TL at higher freq's where the air space + 703 made the biggest difference in the triple leaf tests.

if you find this thread w/o finding the oher thread first, just discard these comments.    this is the thread that this post is aimed at:  

http://forum.studiotips.com/viewtopic.php?t=2504