STC Rating Estimator
Estimate noise reduction from STC-rated wall. Free, instant.
How to Use STC Rating Estimator
1
Enter noise source level.
2
Enter wall STC rating.
3
Get estimated received noise level.
Frequently Asked Questions
What STC is good for walls?
STC 40: normal speech audible. STC 50: loud speech barely audible. STC 60+: excellent isolation.