THE SCIENCE AND APPLICATIONS OF ACOUSTICS - H. H. Arnold ...

12.12 Noise Reduction of a Wall 301Table 12.2. Shell Isolation Rating (SIR).Description Weight (lb/ft 2 ) SIR ratingDense poured concrete or solid block walls4 in. thick 50 416 in. thick 73 438 in. thick 95 4612 in. thick 145 4916 in. thick 190 51Hollow concrete block walls6 in. thick 21 418 in. thick 30 43Brick veneered frame walls — 48–53Stuccoed frame walls — 34–52Frame walls with wood siding — 33–40Metal walls, curtain walls — 25–39Shingled wood roof with attic 10 40Steel roofs — 36–51Fixed, single-glazed windows (the higher SIR — 22–39values apply to windows with special mountingsand laminated glass)Fixed double-glazed windows (the higher SIR — 22–48values apply to windows with large spacesbetween the glass and special mountings)Double-hung windowsSingle-glazed — 20–24Double-glazed — 20–29Casement windows, single-glazed — 19–29Horizontal sliding windows 16–24Glass doors 2.3–3 24Wood doors (the higher SIR values apply toweatherstripped doors)Hollow core 1.2–5 14–26Solid core 4–5 16–30Steel doors (the higher SIR values apply toacoustical doors) 4–23 21–50Figure 12.14. Two rooms separated by a dividing wall of area S w .