3410 Test Results

Typical OITC ratings

OITC Rating Typical Performance

20–25 Basic residential window

26–30 Good traffic noise reduction

31–35 Very good for busy roads

36–40 Excellent for airports and urban env.

40+ High-performance acoustic glazing

Typical STC ratings for fenestration

STC Rating Sound Reduction Typical Application

25–28 Basic Single-pane windows, interior doors

28–32 Fair Standard insulated glass windows

33–37 Good Residential homes near busy roads

38–42 Very Good Hotels, schools, office buildings

43–4 Excellent Hospitals, lux residences, airports

50+ Outstanding Recording studios, specl acoustic rm