8. Sound levels
10
_
Ceiling cassette 4-way
Indoor Units
Indoor unit
Notes:
- Sound measured at 4.9ft away from the center of the unit.
- Data is valid at free field condition.
- Data is valid at nominal operation condition.
- Reference accoustic pressure 0dB=20Pa.
- Sound level will vary depending on a range of factors such as
the construction(acoustic absorption coefficient) of particular
room in which the equipment is installed.
- The operating conditions are assumed to be standard.
4.9ft
Ceiling
Octave band center frequency (Hz)
Sound pressure level (dB re 20uPa)
Octave band center frequency (Hz)
Sound pressure level (dB re 20uPa)
M
L
H
Sound Levels [dB(A)]
Model
AMNW12GTRA0[LMCN125HV]
AMNW18GTQA0[LMCN185HV]
38
38
35
37
32
34
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
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
Overall
Sound pressure level
AMNW12GTRA0
[LMCN125HV]
AMNW18GTQA0
[LMCN185HV]