Existing 520 s.f. carpet at .15
320 s.f. curtains at .30 to .35
2000 s.f tectum at .35
Total existing absorption 882 sabins
Sabins required for a 1 second reverb time is 1325 minus the existing of 882 = 443 sabins for a 1 second reverb time or half of that for the 2 second reverb time.
Our fabric covered wall panel absorbs .8 per s.f. so you need about 34 ea. 2' x 4' x 1" or a total of 275 s.f. of absorber with an NRC of .8 to get to the 2 second reverb (preferred) reverberation.
Certainly any quantity of 80% of this number will have a recognizable impact. Start with something that will make a difference and add more if you want. This works.
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