6-3
SOUND LEVEL CHARACTERISTICS
Revision Y05-02
Service Manual - Delta DCI
6.3 Outdoor
units
6.4
Sound Pressure Level Spectrum
(Measured as Figure 5)
DCR 22 Cooling
DCR 22 Heating
DCR 25 Cooling
DCR 25 Heating
Microphone Distance from Unit
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
SOUND
PRESSURE
LEVEL,
dB
re
0.002
M
ICRO
BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
SOUND
PRESSURE
LEVEL,
dB
re
0.002
M
ICRO
BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
SOUND
PRESSURE
LEVEL,
d
B
re
0
.002
MICRO
BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
SOUND
PRESSURE
LEVEL,
d
B
re
0
.002
MICRO
BAR
