Dehumidifier ML420-MLT1400
9.4 Sound data
Figure 9.3 Duct connections
1. Ductwork for dry air
2. Ductwork for process air
3. Ductwork for reactivation air
4. Ductwork for wet air
Definitions:
Lp(A) = Sound pressure (free field, Directivity factor Q=2, d=1 distance from source in meter)
Lp(A) = Lw(A) + 10Log(Q/(4πd²))
Lw(A) = Sound power level dB (A-weighted)
9.4.1 Sound data ML420
Lp(A) at 1 m
Lw(A)
Measure range (Hz)
dB
dB
63
125
250
500
1000
2000
4000
8000
58
66
72
72
65
60
57
60
55
54
Table 9.3 Sound to room, all inlets and outlets ducted
Duct
Lw(A)
Measure range (Hz)
dB
63
125
250
500
1000
2000
4000
8000
1. Dry air
68
88
79
68
61
57
53
48
41
2. Process air
71
93
80
72
59
59
59
52
50
3. React air
76
93
84
80
73
64
57
54
48
4. Wet air
73
95
83
76
57
48
43
40
27
Table 9.4 Sound in ducts
36
Technical specification
190TGB-1035-H1604
