This is an invited presentation given at the San Diego ASA meeting, 2011, on the uses and application of constrained-layer damping in building noise control and future research in this regard.

1. Use of damped drywall
in architectural
acoustics
Benjamin M. Shafer, Acoustician
Brandon Tinianov, LEED AP

2. Acknowledgements
• John LoVerde
• Gary Mange
• David Moyer
• Dave Berg

3. Outline
• Introduction to QuietRock
• CLD theory
• Building construction
applications
• Discoveries and realizations
• The Future of Damped
Drywall

4. QuietRock Birth
High TL
Costly
Hard to
Cut

5. QuietRock Today
High TL
$$
Easy to
Cut

6. CLD Theory
Constrained-Layer Damping (CLD)
Shear loading of the damping layer causes decreased
displacement, converting mechanical energy (vibration) into
heat1
1L. Cremer, M. Heckl, E.E. Ungar, Structure-Borne Sound, 2nd Edition, Springer-Verlag, Berlin, Heidelberg, Germany (1988), pg. 247.

7. CLD Theory2
d1 1
a d2 2
d3 3
2I. Vér, L. Beranekl, E. Ungar, J. Zapfe, Noise and Vibration Control Engineering, John Wiley & Sons, Inc., Hoboken, NJ, USA (2006), pp. 602-607.

8. CLD Theory
Composite Loss Factor ( ) Comparisons
0.5
0.4
Loss factor, 
0.3
QuietRock ES
5/8" Type X
0.2
0.1
0 2 3
10 10
Frequency (Hz)

9. CLD Theory
TL Comparison, QR ES vs. 5/8'' Type X
60
50
Transmission Loss (dB)
40
30
20
10
QuietRock ES
5/8'' Type X
0 2 3
10 10
Frequency (Hz)

10. CLD Theory
Laboratory TL Comparison, QR ES vs. 5/8" Type X
60
50
Transmission Loss (dB)
40
30
20
10
QuietRock ES, STC 31, TL11-511
5/8" Type X, STC 28, TL11-503
0
63 100 160 250 400 630 1000 1600 2500 4000
Frequency (Hz)

11. Building Applications, Wood
Sgl. 2X4 Sgl. 2X4 Stgd. 2X4
16” OC 24” OC 8” OC

12. Building Applications, Wood
TL Comparison, Single 2X4 Wood 16" OC
80
70
Transmission Loss (dB)
60
50
40
30
20
X/X, TL09-257 (35)
10 QR ES/X, TL09-256 (41)
QR ES/QR ES, TL09-255 (41)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

13. Building Applications, Wood
TL Comparison, Single 2X4 Wood 24" OC
80
70
Transmission Loss (dB)
60
50
40
30
20
X/X, OL11-0313 (43)
10 QR ES/X, OL11-0314 (51)
QR ES/QR ES, OL11-0320 (54)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

14. Building Applications, Wood
TL Comparison, QuietRock ES
80
70
Transmission Loss (dB)
60
50
40
30
20
Sgl 16OC, TL09-255 (41)
Sgl 24OC, OL11-0320 (54)
10 QR ES/X Stgd 8OC, TL10-120 (55)
QR ES/X+X Stgd 8OC, TL10-121 (60)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

15. Building Applications, Single Steel
HvGa. 3-5/8” HvGa. 6” LtGa. 3-5/8”
16” OC 16” OC 24” OC

16. Building Applications, 3-5/8” Steel
TL Comparison, S&V March ‘103
80
70
Transmission Loss (dB)
60
50
40
30
20
X/X 25ga 24OC, TL06-233 (43)
10
X/X+X 25ga 24OC, TL06-232 (48)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)
3Aaron Bétit, Veneklasen Associates, “Performance Details of Metal Stud Partitions,” Sound and Vibration Magazine, March 2010, pp. 14–16.

17. Building Applications, 3-5/8” Steel
TL Comparison, S&V March '103
80
70
Transmission Loss (dB)
60
50
40
30
X/X 25ga 24OC, TL06-233 (43)
20
X/X+X 25ga 24OC, TL06-232 (48)
10 X/X 16ga 16OC, TL06-246 (38)
X/X+X 16ga 16OC TL06-247 (42)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)
3Aaron Bétit, Veneklasen Associates, “Performance Details of Metal Stud Partitions,” Sound and Vibration Magazine, March 2010, pp. 14–16.

18. Building Applications, 3-5/8” Steel
QuietRock ES, 16ga. 16” OC
80
70
Transmission Loss (dB)
60
50
40
30
20
X/X+X 16ga 16OC, TL10-392 (42)
10 QR ES/X 16ga 16OC, TL10-393 (43)
QR ES/QR ES 16ga 16OC, TL10-394 (48)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

19. Building Applications, 6” Steel
TL Comparison, 16Ga. 16" OC
80
70
Transmission Loss (dB)
60
50
40
30
20
X/X+X 16ga 16OC, TL10-397 (44)
10 QR ES/X 16ga 16OC, TL10-398 (49)
QR ES/QR ES 16ga 16OC, TL10-399 (53)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

20. Building Applications, 3-5/8” Steel
TL Comparison, 25Ga. 24" OC
80
70
Transmission Loss (dB)
60
50
40
30
20
X/X 25ga 24OC, OL11-0332b (49)
10 QR ES/X 25ga 24OC, OL11-0333 (55)
QR ES/X+X 25ga 24OC, OL11-0334 (60)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

21. Building Applications, 3-5/8” Steel
TL Comparison, QuietRock ES
80
70
Transmission Loss (dB)
60
50
40
30
20 QR ES/QR ES 16ga 16OC, TL10-394 (48)
QR ES/QR ES 6" 16ga 16OC, TL10-399 (53)
10 QR ES/X 25ga 24OC, OL11-0333 (55)
QR ES/X+X 25ga 24OC, OL11-0334 (60)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

22. Discoveries and Realizations
Sgl. 3-5/8” HvGa. Steel 16” OC w/ 3-1/2” Insulation
90
85
Speech Privacy Class (SPC)
80
75
70
76
72 69
67
65
60
X+X / X QR ES / X X+X / X+X QR ES / QR ES

23. Discoveries and Realizations
QuietRock ES, 16" OC vs 24" OC
80
70
Transmission Loss (dB)
60
50
40
30
20
10 QR ES/X 16ga 16OC, TL10-393 (43)
QR ES/X 16ga 24OC, TL10-395 (49)
0
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

24. Discoveries and Realizations
Same Exact Wall, Different Laboratory
80
70
Transmission Loss (dB)
60
50
40
30
20
Lab One
Lab Two
10
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

25. Discoveries and Realizations
QuietRock / X vs X+X+X+X+X / X+X+X+X
80
70
Transmission Loss (dB)
60
50
40
30
20 QuietRock
8-Layer
10
80 125 200 315 500 800 1250 2000 3150 5000
Frequency (Hz)

26. The Future of Damped Drywall
Laboratory
Investigation
Independent
Optimization
Field Testing
System
Theory/Model Progress Analysis

27. Thank you
Questions?