Sanyo Big PACi 18 Series Technical Data & Service Manual page 104

1-8. Noise Criterion Curves
Concealed-Duct Type
MODEL
: SPW-US185H
SOUND LEVEL : STRONG
WEAK
1.5 m directly below unit
CONDITION :
60
50
40
30
20
Approximate
minimum
audible limit for
continuous noise
10
63 125 250
Overall
Frequency at center of sound pressure band (Hz)
REMARKS: 1. Value obtained in the actual place where the unit is
installed may be slightly higher than the values shown
in this graph because of the conditions of operation,
the structure of the building, the background noise and
other factors.
2. The test results were obtained from an anechoic room.
3. The layout of the testing condition is shown at right.
NOTE
To evaluate the noise level, the maximum value of the measured sound pressure level is used. Read the value at
each frequency level (on horizontal axis, center of the sound pressure band) from 63 Hz to 8000 Hz, and select the
corresponding maximum value indicated on the vertical axis.
35 dB(A)
31 dB(A)
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
Air discharge
(Concealed-Duct Type)
1-99
Both 50Hz / 60Hz
Strong
Weak
Auxiliary Duct Auxiliary Duct
of 2 m length of 1 m length
Air intake
Unit
1.5 m directly below unit
1