FOUR-WAY CASSETTE | 21
Product Data
Due to our policy of continuous product innovation, some specications may change without notication.
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Figure 10: Indoor Unit Sound Pressure Level
Measurement Location.
• 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.
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
LCN187HV, LCN247H
Figure 11: Four-Way Ceiling Cassette Indoor Unit
Sound Pressure Level Diagrams.
Table 6: Four-Way Ceiling Cassette Indoor Unit Sound Pressure Levels (dB[A]).
Model
Sound Pressure Levels (dB[A])
H M L
LCN097HV4 36 33 30
LCN127HV4 38 35 32
LCN187HV 38 36 34
LCN247HV 38 36 34
LCN367HV 46 44 43
LCN427HV 46 44 43
ACOUSTIC DATA
Indoor Units
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Octave Band Center Frequency (Hz)
NC-15
NC-70
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
Sound Pressure Level (dB re 20uPa)
LCN097HV4
Octave band center frequency (Hz)
Sound pressure level (0 dB = 20 µPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
LCN127HV4
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa
)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
CN367HV, LCN427HV