Noise Criterion Curves - Sanyo ECO-i AHX0752 Technical Data Manual

5. Concealed Duct High-Static Pressure Type (D Type)

5-4. Noise Criterion Curves

MODEL : DHX3652
SOUND LEVEL : HIGH 45 dB(A), NC 39
CONDITION : Under the unit 4.9 ft
SOURCE : 208 - 230 V, Single-phase, 60 Hz
90
80
70
60
50
40
1
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
2
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
3
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.
NOTE
To evaluate the noise level, the maximum value of the measured sound pressure level is used. Read the value at each fre-
4
quency 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.
5
6
7
8
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
250 500 1000 2000 4000 8000
W-3WAY ECO-i SYSTEM Unit Specifi cations
MODEL : DHX4852
SOUND LEVEL : HIGH 47 dB(A), NC 42
CONDITION : Under the unit 4.9 ft
SOURCE : 208 - 230 V, Single-phase, 60 Hz
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
Frequency at center of sound pressure band (Hz)
4-64
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000