Sound measurement method, Noise data, Logicool ™ onrak active cabinet exhaust it cooling – Airedale OnRak 3kW 35kW User Manual
Page 20
LogiCool
™ OnRak
Active Cabinet Exhaust
IT Cooling
20
IT Cooling
Technical, Installation and Maintenance Manual :6912497 V1.5.0 02_2013
Sound Measurement Method
Measurement of Sound
Data
All sound data quoted has been measured in the third-octave band limited values,
using a real time analyser calibrated sound intensity meter in accordance with BS
EN ISO9614 Part 1: 1995.
All sound power levels quoted are calculated from measured sound intensity
according to BS EN ISO9614 Part 1: 1995.
Semi Hemispherical
Sound pressure levels are calculated from sound power using the semi-
hemispherical method where the noise source is in junction with 1 boundary i.e. the
floor.
Free Field
For comparison, the semi hemispherical figures can typically be reduced by 3dB to
provide free field conditions.
Specialist acoustic advice is recommended for noise critical applications.
Noise Data
LOR 6042U-C028-0
Frequency (Hz)
Overall
63
125
250
500
1000
2000
4000
8000
Sound Pressure @ 1m dB(A)
62
35
43
48
58
57
55
51
39
LOR 6042U-C033-0
Frequency (Hz)
Overall
63
125
250
500
1000
2000
4000
8000
Sound Pressure @ 1m dB(A)
67
42
46
53
61
62
60
56
47
LOR 8042U-C032-0
Frequency (Hz)
Overall
63
125
250
500
1000
2000
4000
8000
Sound Pressure @ 1m dB(A)
62
35
43
48
58
57
55
51
39
LOR 8042U-C038-0
Frequency (Hz)
Overall
63
125
250
500
1000
2000
4000
8000
Sound Pressure @ 1m dB(A)
67
42
46
53
61
62
60
56
47