Johnson Controls JX Series Engineering Manual page 100

FORM 121.00-EG1
ISSUE DATE: 5/31/2012
Concealed Duct High Static Pressure (JD Type)
Noise Criterion Curves
MODEL
SOUND LEVEL
CONDITION
SOURCE
90
80
70
60
50
1
40
30
2
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
Frequency at center of sound pressure band (Hz)
3
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.
4
2. The test results were obtained from an anechoic room.
NOTE
5
To evaluate the noise level, the maximum value of the measured sound pressure level is used. Read the value at each fre-
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.
6
7
8
JOHNSON CONTROLS
: JDHX3652N
: HIGH 45 dB(A), NC 39
: Under the unit 4.9 ft
: 208 - 230 V, Single-phase, 60 Hz
500 1000 2000 4000 8000
MODEL
SOUND LEVEL
CONDITION
SOURCE
90
80
NC-70 70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
NC-20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
Frequency at center of sound pressure band (Hz)
: JDHX4852N
: HIGH 47 dB(A), NC 42
: Under the unit 4.9 ft
: 208 - 230 V, Single-phase, 60 Hz
63 125 250 500 1000 2000 4000 8000
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
100