Reduce the sound power level of a WKF 120
1)
with the sound absorption hood SWK 5
Middle frequen. [Hz]
100
125
160
200
250
315
400
500
630
800
Measuring results from independent test report
2)
Sound power level
L
WA
[dB(A)]
49,9
54,3
50,5
54,9
62,7
55,7
55,9
54,6
57,4
57,1
Measuring results with the sound absorption hood
3),4)
Sound power level
L
WA
[dB(A)]
43,0
48,6
42,5
46,1
56,7
48,8
45,0
45,8
46,4
50,3
Middle frequen. [Hz]
1000
1250
1600
2000
2500
3150
4000
5000
6300
Total
Measuring results from independent test report
2)
Sound power level
L
WA
[dB(A)]
59,0
54,3
52,3
49,9
47,2
44,8
41,7
36,1
33,3
67,9
Measuring results with the sound absorption hood
3),4)
Sound power level
L
WA
[dB(A)]
46,3
43,1
40,7
35,4
34,3
33,1
29,8
26,3
25,5
60,2
1)
Compressor frequency 60 Hz
2)
Measurement in accordance with DIN EN ISO 9614-2 (12/1996) and DIN EN 12102 (09/2008)
3)
Measurement in accordance with DIN EN ISO 3744
4)
Less the measurement uncertainty of 4 dB(A) in accordance with DIN EN ISO 3744
2
1
A
B
a
67,9 dB(A)
60,2 dB(A)
0
10
20
30
40
50
60
70
80
A: Sound power level L
WA
[dB(A)]
B: Middle frequency [Hz]
a: Sound power level total
1: Measuring results independent test report
2: Measuring results with the sound absorption
hood
REMKO noise protection hood
12
