TRANSMISISON
OF AIRBORNE NOISE
| Flanking Paths | Noise Leaks | |||
| F1 | Open plenums - over walls and through suspended ceilings | L1 | Poor seal at wall/ceiling connection | |
| F2 | Common ductwork | L2 | Poor seal at wall/wall connection | |
| F3 | Adjacent exterior windows | L3 | Poor seal at wall/mullion connection | |
| F4 | Common floor heaters | L4 | Poor seal around outlet penetration (also avoid back-to-back outlets) | |
| F5 | Open vents | L5 | Poor seal at wall penetration | |
| F6 | Louvered doors | L6 | Poor seal at floor penetration | |
| F7 | Under doors | L7 | Poor seal at wall/floor connection | |
| L8 | Poor seal around door | |||
Rules of Thumb
Recommended Ratings
Weaknesses - What You Should Know
The difference between STC and NRC
STC Ratings for Various Wall Assemblies
STC Ratings for Masonry Walls
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