Wy the much better measure with less noise did not show EDT T20 T30 ?

[user44455555]

Hi

I drill 40 mm holes in my wardrobe doors, to use it as a resonator to damp low freq. better sound and the results and decay shape get much better, but it did not show T20 or schroeder integral in RT60m decay i have enable that. it happen also on my other measures mostly not work only sometimes. what are the rules to see always such results ?. for edt T20 and T30 i think is not so much SNR need.

more measures form me with diffrent hole count for compare can see here . holes give the best and cheapest low freq enhancement and clarity enhancement. can hear and measure https://www.avnirvana.com/threads/w...cisions-on-what-to-do-next.16827/#post-124451

here the better SNR and decy shape but no EDT no T20 T30

 

[John Mulcahy]

You have to generate the classical results on the RT60 graph for the octave fraction you want to view.