Sanyo SPW-C256VH Technical Data & Service Manual page 307

1-8. Noise Criterion Curves
Concealed-Duct Type
MODEL : SPW-UR364GH56 (A/B)
SPW-UR364SH56B
SPW-U365H (N)
SPW-U365SH (T)
SOUND LEVEL : STRONG 38 dB(A), NC 30 / WEAK 31 dB(A), NC 21
CONDITION : Under the unit 1.5 m
: 220 - 230 - 240 V, Single Phase, 50 Hz
SOURCE
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEATING FOR
CONTINUOUS
NOISE
10
63 125 250
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.
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
MODEL : SPW-UR484 / 604GH56 (A/B)
SPW-UR484 / 604SH56B
SPW-U485 / 605H (N)
SPW-U485 / 605SH (T)
SOUND LEVEL : STRONG 40 dB(A), NC 33 / WEAK 33 dB(A), NC 25
CONDITION : Under the unit 1.5 m
: 220 - 230 - 240 V, Single Phase, 50 Hz
SOURCE
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEATING FOR
CONTINUOUS
NOISE
10
63 125 250
Frequency at center of sound pressure band (Hz)
Air discharge
(Concealed-Duct Type)
1-301
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
Auxiliary Duct
Auxiliary Duct
of 2 m length
of 1 m length
Air intake
Unit
1.5 m directly below unit
1