6-1
SOUND LEVEL CHARACTERISTICS
SM FLODCI 2-A.4 GB
6.
SOUND LEVEL CHARACTERISTICS
6.1
Sound Pressure Level
6.2
Sound Pressure Level Spectrum
(Measured as Figure 1)
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
FAN SPEED
LINE
HI
ME
LO
1m
0.8m
Mic.
Unit
Wall
BAND CENTER FREQUENCIES, Hz
A
PPRO
X
IM
A
TE
THRE
S
HOLD OF
HE
A
RING FOR
CONTINUOU
S
NOI
S
E
NC-70
NC-60
NC-50
NC-40
NC-
3
0
NC-20
OCT
A
V
E
BAND
SOUND
PRESSURE
LEVEL,
dB
re
0.002
MICRO
BAR
BAND CENTER FREQUENCIES, Hz
A
PPRO
X
IM
A
TE
THRE
S
HOLD OF
HE
A
RING FOR
CONTINUOU
S
NOI
S
E
NC-70
NC-60
NC-50
NC-40
NC-
3
0
NC-20
OCT
A
V
E
BAND
SOUND
PRESSURE
LEVEL,
dB
re
0.002
MICRO
BAR
FLO 24
FLO 30
FLO 18
FLO 21
Figure 1
CONTENTS
