281 / 416
H
GENERAL ACOUSTIC INFORMATION
Width
(mm)
Height
(mm) 63 125 250 500 1k 2k 4k 8k
100 100
6.7 6.8 7.1 11.6 33.1 34.0 15.4 9.0
100 150
5.0 5.4 6.2 10.6 29.2 29.4 14.2 8.6
100 200
4.2 4.7 5.7 10.1 27.1 27.0 13.5 8.4
100 250
3.8 4.4 5.4 9.7 25.9 25.5 13.1 8.3
150 150
3.6 4.1 5.2 9.5 25.0 24.6 12.8 8.2
150 250
2.7 3.2 4.4 8.5 21.4 20.6 11.6 7.8
150 300
2.5 3.0 4.2 8.3 20.5 19.5 11.3 7.7
150 400
2.3 2.7 3.9 7.9 19.3 18.2 10.9 7.6
200 200
2.5 3.0 4.2 8.3 20.5 19.5 11.3 7.7
200 300
2.1 2.4 3.7 7.6 18.1 16.9 10.4 7.4
200 400
2.0 2.2 3.4 7.2 16.8 15.5 9.9 7.3
200 600
1.8 2.0 3.1 6.8 15.5 14.1 9.4 7.1
250 250
2.1 2.4 3.6 7.4 17.6 16.3 10.2 7.4
250 400
1.8 1.9 3.1 6.7 15.2 13.8 9.3 7.0
250 500
1.7 1.8 2.9 6.5 14.4 13.0 9.0 6.9
250 600
1.7 1.7 2.8 6.3 13.9 12.4 8.7 6.8
300 300
1.8 2.0 3.1 6.8 15.5 14.1 9.4 7.1
300 400
1.7 1.8 2.9 6.4 14.1 12.7 8.9 6.9
300 600
1.6 1.6 2.6 5.9 12.7 11.2 8.3 6.6
300 800
1.4 1.5 2.5 5.8 12.1 10.5 8.0 6.6
400 400
1.6 1.6 2.6 5.9 12.7 11.2 8.3 6.6
400 600
1.2 1.3 2.3 5.5 11.3 9.8 7.7 6.4
400 800
1.1 1.2 2.1 5.2 10.5 9.0 7.3 6.3
400 1000
1.0 1.1 2.0 5.0 10.0 8.5 7.1 6.2
500 500
1.2 1.3 2.2 5.4 11.0 9.5 7.5 6.4
500 600
1.1 1.2 2.1 5.2 10.3 8.8 7.2 6.2
500 800
1.0 1.0 1.9 4.8 9.5 8.0 6.9 6.1
500 1000
0.9 0.9 1.8 4.7 9.0 7.5 6.6 6.0
600 600
1.0 1.1 1.9 4.9 9.7 8.2 6.9 6.1
600 800
0.9 0.9 1.7 4.6 8.8 7.3 6.5 5.9
600 1200
0.8 0.8 1.5 4.2 7.9 6.5 6.1 5.7
600 1600
0.7 0.7 1.4 4.1 7.5 6.1 5.8 5.6
800 800
0.8 0.8 1.5 4.2 7.9 6.5 6.1 5.7
800 1000
0.7 0.7 1.4 4.0 7.4 6.0 5.8 5.6
800 1200
0.6 0.6 1.3 3.9 7.0 5.6 5.6 5.5
800 1600
0.6 0.6 1.2 3.7 6.5 5.2 5.3 5.4
1000 1000
0.6 0.6 1.3 3.8 6.8 5.4 5.5 5.5
1000 1200
0.6 0.6 1.2 3.6 6.4 5.1 5.3 5.3
1000 1600
0.5 0.5 1.1 3.4 5.9 4.6 5.0 5.2
1000 2000
0.5 0.5 1.0 3.3 5.5 4.3 4.8 5.1
1200 1200
0.5 0.5 1.1 3.4 6.0 4.7 5.1 5.2
1200 1600
0.5 0.5 1.0 3.2 5.4 4.2 4.8 5.1
1200 2000
0.4 0.4 0.9 3.1 5.1 3.9 4.6 5.0
1200 2400
0.4 0.4 0.9 3.0 4.9 3.7 4.4 4.9
Width
(mm)
Height
(mm) 63 125 250 500 1k 2k 4k 8k
100 100
11.8 12.6 14.8 24.4 33.1 34.0 15.4 9.0
100 150
8.5 9.9 12.8 22.3 29.2 29.4 14.2 8.6
100 200
7.1 8.6 11.7 21.2 27.1 27.0 13.5 8.4
100 250
6.4 7.9 11.1 20.5 25.9 25.5 13.1 8.3
150 150
5.9 7.4 10.7 20.0 25.0 24.6 12.8 8.2
150 250
4.2 5.6 9.0 17.9 21.4 20.6 11.6 7.8
150 300
3.9 5.1 8.5 17.3 20.5 19.5 11.3 7.7
150 400
3.4 4.6 8.0 16.6 19.3 18.2 10.9 7.6
200 200
3.9 5.1 8.5 17.3 20.5 19.5 11.3 7.7
200 300
3.1 4.1 7.4 15.9 18.1 16.9 10.4 7.4
200 400
2.7 3.7 6.8 15.1 16.8 15.5 9.9 7.3
200 600
2.4 3.2 6.2 14.2 15.5 14.1 9.4 7.1
250 250
2.9 3.9 7.2 15.5 17.6 16.3 10.2 7.4
250 400
2.4 3.1 6.1 14.0 15.2 13.8 9.3 7.0
250 500
2.2 2.9 5.7 13.5 14.4 13.0 9.0 6.9
250 600
2.1 2.7 5.5 13.1 13.9 12.4 8.7 6.8
300 300
2.4 3.2 6.2 14.2 15.5 14.1 9.4 7.1
300 400
2.2 2.8 5.6 13.3 14.1 12.7 8.9 6.9
300 600
2.0 2.4 5.0 12.3 12.7 11.2 8.3 6.6
300 800
1.6 2.2 4.8 11.9 12.1 10.5 8.0 6.6
400 400
2.0 2.4 5.0 12.3 12.7 11.2 8.3 6.6
400 600
1.5 2.0 4.4 11.4 11.3 9.8 7.7 6.4
400 800
1.3 1.7 4.0 10.8 10.5 9.0 7.3 6.3
400 1000
1.2 1.6 3.8 10.4 10.0 8.5 7.1 6.2
500 500
1.4 1.9 4.3 11.1 11.0 9.5 7.5 6.4
500 600
1.3 1.7 4.0 10.7 10.3 8.8 7.2 6.2
500 800
1.1 1.5 3.6 10.0 9.5 8.0 6.9 6.1
500 1000
1.0 1.3 3.4 9.6 9.0 7.5 6.6 6.0
600 600
1.1 1.5 3.7 10.2 9.7 8.2 6.9 6.1
600 800
1.0 1.3 3.3 9.5 8.8 7.3 6.5 5.9
600 1200
0.8 1.1 2.9 8.8 7.9 6.5 6.1 5.7
600 1600
0.8 1.0 2.7 8.4 7.5 6.1 5.8 5.6
800 800
0.8 1.1 2.9 8.8 7.9 6.5 6.1 5.7
800 1000
0.8 1.0 2.7 8.3 7.4 6.0 5.8 5.6
800 1200
0.7 0.9 2.5 8.0 7.0 5.6 5.6 5.5
800 1600
0.6 0.8 2.3 7.6 6.5 5.2 5.3 5.4
1000 1000
0.7 0.8 2.4 7.8 6.8 5.4 5.5 5.5
1000 1200
0.6 0.8 2.3 7.5 6.4 5.1 5.3 5.3
1000 1600
0.6 0.7 2.0 7.1 5.9 4.6 5.0 5.2
1000 2000
0.5 0.6 1.9 6.8 5.5 4.3 4.8 5.1
1200 1200
0.6 0.7 2.1 7.2 6.0 4.7 5.1 5.2
1200 1600
0.5 0.6 1.9 6.7 5.4 4.2 4.8 5.1
1200 2000
0.5 0.5 1.7 6.4 5.1 3.9 4.6 5.0
1200 2400
0.4 0.5 1.7 6.2 4.9 3.7 4.4 4.9
d (mm)
63 125 250 500 1k 2k 4k 8k
100
0
0
0
1
6
11 10 10
150
0
0
0
1
6
11 10 10
200
0
0
1
6
11 10 10 10
250
0
0
1
6
11 10 10 10
300
0
0
1
6
11 10 10 10
400
0
1
6
11 10 10 10 10
500
0
1
6
11 10 10 10 10
600
0
1
6
11 10 10 10 10
800
1
6
11 10 10 10 10 10
1000
1
6
11 10 10 10 10 10
1200
1
6
11 10 10 10 10 10
1600
6
11 10 10 10 10 10 10
2000
6
11 10 10 10 10 10 10
2400
6
11 10 10 10 10 10 10
d (mm)
63 125 250 500 1k 2k 4k 8k
100
0
0
0
1
4
7
7
7
150
0
0
0
1
4
7
7
7
200
0
0
1
4
7
7
7
7
250
0
0
1
4
7
7
7
7
300
0
0
1
4
7
7
7
7
400
0
1
4
7
7
7
7
7
500
0
1
4
7
7
7
7
7
600
0
1
4
7
7
7
7
7
800
1
4
7
7
7
7
7
7
1000
1
4
7
7
7
7
7
7
1200
1
4
7
7
7
7
7
7
1600
4
7
7
7
7
7
7
7
2000
4
7
7
7
7
7
7
7
2400
4
7
7
7
7
7
7
7
Table 1: 25mm lined duct
Table 3: Square lined bend with turning vanes
Insertion Loss, dB/metre
Octave Band Centre Frequency (Hz)
Table 4: Square lined bend without turning vanes
Insertion Loss, dB/metre
Octave Band Centre Frequency (Hz)
Insertion Loss, dB/bend
Octave Band Centre Frequency (Hz)
Insertion Loss, dB/bend
Octave Band Centre Frequency (Hz)
Table 2: 50mm lined duct
NOISE CONTROL PRODUCTS
H-27
© FANTECH
2016
REFERENCE INFORMATION: ACOUSTIC LOSSES OF LINED DUCT & BENDS