Acoustic Data - LG LH247HV Engineering Manual

Figure 8: Indoor Unit Sound Pressure Level Measurement Location.
DISCHARGE
DUCT
6.6 ft.
Figure 9: Ceiling-Concealed Duct (High Static) Indoor Unit Sound Pressure Level Diagrams.
LHN247HV
80
70
60
50
40
30
20
Approximate
Hearing
Threshold
10
63 125 250 500 1000 2000 4000
Octave Band Center Frequency (Hz)
SUCTION
DUCT
3.3 ft.
LHN367HV
80
70
NC-65
60
NC-60
NC-55
50
NC-50
NC-45
40
NC-40
NC-35
30
NC-30
NC-25
20
Approximate
NC-20
Hearing
Threshold
NC-15
10
8000 63 125 250
Octave Band Center Frequency (Hz)
Due to our policy of continuous product innovation, some specifications may change without notification.
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• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Table 6: Ceiling-Concealed Duct (High Static) Indoor Unit Sound
Pressure Levels (dB[A]).
Model
LHN247HV
LHN367HV
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
500 1000 2000 4000 8000

aCouStiC data

Indoor units
Sound Pressure Levels (dB[A])
H M
38 36
39 38
duct (HIgH StatIc) | 17
L
35
37