9. Sound Levels
9.2 Sound Power Levels
Notes:
• Data is valid at diffuse field condition
• Data is valid at nominal operating condition
• Sound level can be increased in static pressure mode or
used air guide.
• Sound power level is measured on the rated condition in the
reverberation rooms.
•
Sound level will vary depending on a range of factors such as
the construction (acoustic absorption coefficient) of particular
room in which the equipment in installed.
•
Reference acoustic intensity 0dB = 10E-6μW/m
2
Model
Sound Power Levels dB(A)
High Fan Speed
ARNU09GTR*4
51.0
ARNU15GTR*4
55.0
Octave Band Center Frequency (Hz)
20
30
40
50
60
70
80
90
100
125
250
500
1000
2000
4000 8000
NR-30
NR-35
NR-40
NR-45
NR-50
NR-55
NR-60
NR-65
NR-70
NR-75
NR-80
NR-85
NR-90
Octave Band Sound Power Level (dB = 10E-6μW/m
2
)
Octave Band Center Frequency (Hz)
20
30
40
50
60
70
80
90
100
125
250
500
1000
2000
4000 8000
NR-30
NR-35
NR-40
NR-45
NR-50
NR-55
NR-60
NR-65
NR-70
NR-75
NR-80
NR-85
NR-90
Octave Band Sound Power Level (dB = 10E-6μW/m
2
)
ARNU09GTR*4
ARNU15GTR*4
Indoor Units
12
_
Compact Model
Indoor unit