Airwell Multi Split DUO 50 DCI, Service Manual

Page: 44 / 151

7-1
SOUND LEVEL CHARACTERISTICS
SM DLF 1-A.1 GB
7. SOUND LEVEL CHARACTERISTICS
7.1 Sound Pressure Level
Figure 1
7.2 Soud Pressure Level Spectrum (Measured as Figure 1)
DLF 25 DLF 35
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
SOUND
PRESSURE
LEVEL,
dB
re
0.002
MICRO
BAR
NC-10
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
MICRO
BAR
NC-10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
FAN SPEED LINE
HI
ME
LO
1.4m
Mic.
Unit
2m duct in
return air area
2m duct in
supply air area
static
pressure
test point
(2(AB)
1/2
)