Ballast question

Ramp, Stair, & Roof Vignettes and Multiple Choice

Ballast question

Postby pig » Sat Dec 02, 2017 9:57 pm

Materials or assemblies with a high NRC generally have:
A. a high STC
B. a low STC
C. a high reverberation time
D. a low absorption coefficient

why is the answer B?
if the assembly can absorb a lot of noise, then there is little noise bouncing around, then does that not lead to a better sound insulation for the room next door which in turn mean a good (high) STC?

please enlighten~
pig
 
Posts: 111
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Re: Ballast question

Postby Michelle » Sun Dec 10, 2017 10:49 pm

I just took Building System and think you are right.
Michelle
 
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Joined: Wed Sep 02, 2015 6:27 am


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