18
A5HDC-2009
Sound Data
Sound Data
Sound Pressure Level
Ext. Static
(mmAq)
125Hz 250Hz 500Hz
1kHz
2kHz
4kHz
8kHz
6.5
High
42
39
36
34
28
22
17
38
33
6.0
Medium
41
37
34
31
26
20
15
36
30
3.5
Low
40
36
32
29
23
18
13
34
27
5.5
High
42
41
37
34
31
29
23
40
33
4.0
Medium
41
40
36
33
29
28
22
39
32
3.0
Low
36
35
33
31
26
27
21
36
30
A5CC25CR
Noise
Criteria
Overall
A (dBA)
1/1 Octave A-Weighted Sound Pressure (dBA), ref 20µPa
Model
Speed
A5CC20CR
Microphone position: 1.4m below the centre of the unit. (GB Standard- GB/ D17758)
Tested with 2m length duct at the discharge outlet and air return inlet.
Model
Measuring Location
Standard: GB/D 17758
A5CC20CR
A5CC25CR
Test Unit
2m length test duct
2m length test duct
Air
1.4m
Microphone
