Roof and Wall - Lane Roofing

Acoustic Systems
Sound Reduction Index
Measurement (1/3 octave)
Sound Absorption Index
Measurement (1/3 octave)
Frequency SR3-LP LPC Paramount SAR8-SLT
(Hz) C/95/5L/1721/1 System* AT/92/07
Test 1
50 13.9 23.4
63 10.8 17.6
80 6.5 23.2
100 12.2 12.2 22.2
125 16.4 14.0 27.5
160 19.9 15.8 27.9
200 23.2 17.4 32.4
250 31.0 19.2 35.2
315 36.1 21.2 37.0
400 40.5 23.2 40.2
500 43.4 25.3 41.4
630 46.4 27.6 43.1
800 48.4 30.2 42.9
1000 51.7 32.8 45.1
1250 51.4 35.7 45.6
1600 52.6 39.2 47.5
2000 53.0 42.6 47.3
2500 52.5 46.2 49.4
3150 55.8 50.0 50.1
4000 59.5 53.4 51.4
5000 61.3 53.7 52.7
6300 60.3 54.8
8000 60.6 55.5
10000 56.5 54.3
Frequency SAR4-SLT LPC Paramount
(Hz) AT/92/07 System
System 2
50
63
80
100 0.38 0.24
125 0.57 0.47
160 0.53 0.41
200 0.65 0.47
250 0.64 0.53
315 0.79 0.68
400 0.76 0.82
500 0.74 0.84
630 0.77 0.82
800 0.81 0.81
1000 0.81 0.81
1250 0.82 0.76
1600 0.84 0.77
2000 0.87 0.79
2500 0.89 0.80
3150 1.02 0.79
4000 1.01 0.85
5000 1.23 1.00
6300
8000
Average SRI (dB) 39.7 31.0
Weighted SRI (dB) 39 30.3
* Predicted Results
Extensive range of systems
Acoustic Systems 31