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ASTM and DIN testing..... is there a diffrence?
Posted: Thu Jun 08, 2006 7:23 am
by djoki
How the absorption coefficients of 703 would look like in DIN?
http://www.owenscorning.com/comminsul/d ... Series.pdf
Posted: Fri Jun 09, 2006 12:12 am
by AVare
A little different. ASTM testing data is for 1/3 octave bands. Even when only octave frequencies are reported, the actual data is 1/3 octave bands. DIN reporting on octave frequencies is for the octave band average of the three 1/3 octave bands. That is one difference that I recall immediately. Perhaps Eric can jump in provide a complete accurate description of the differences.
Andre
Posted: Sat Jun 10, 2006 6:29 am
by djoki
AVare wrote:A little different. ASTM testing data is for 1/3 octave bands. Even when only octave frequencies are reported, the actual data is 1/3 octave bands. DIN reporting on octave frequencies is for the octave band average of the three 1/3 octave bands. That is one difference that I recall immediately. Perhaps Eric can jump in provide a complete accurate description of the differences.
Andre
Hmmm....what this diffrence would look like when 703 would be measured with DIN norms?
Would the absorption coefficients change?
Code: Select all
ASTM
in mm 125 250 500 1000 2000 4000 Hz
703 2 (51) 0.17 0.86 1.14 1.07 1.02 0.98
Posted: Sat Jun 10, 2006 6:52 am
by AVare
I can not answer your question at all with the information you gave. ASTM testing AND reporting is on 1/3 octave bands. You have only shown the results in every third band, not all of them.
Andre
Posted: Sat Jun 10, 2006 9:00 am
by djoki
AVare wrote:I can not answer your question at all with the information you gave. ASTM testing AND reporting is on 1/3 octave bands. You have only shown the results in every third band, not all of them.
Andre
I would show you more results but I don't have
In Produkt PDFs they only show what I have posted.
Thanks for attansion...