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Model
Speed
High
FUD20B
Med
Low
High
FUD25B
Med
Low
FUD30B
High
FUD40B
High
Microphone position: 1m in front of the unit and center of the unit.
1m away from every side of the unit and 1m above floor level
30
1/1 Octave A-Weighted Sound Pressure (dBA), ref 20µPa Overall
125Hz
250Hz
500Hz
57
50
47
57
46
44
48
42
41
57
53
50
55
51
49
54
50
48
57
55
56
57
55
56
1kHz
2kHz
4kHz
44
40
35
40
35
30
35
30
24
50
44
40
48
42
38
46
40
35
53
51
46
53
51
46
Sound Data
Noise
(dBA)
Criteria
8kHz
24
50
43
17
46
41
6
42
36
31
54
49
28
52
47
25
50
45
38
58
53
38
58
53
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