4
4
-
8
4
3-WAY FLOW LOGIC Unit Specifications
MODEL
: ST-NPFL 12
SOUND LEVEL :
35 dB(A)
LOW
HIGH
30 dB(A)
32 dB(A)
CONDITION
:
MODEL
: ST-NPFL 18
SOUND LEVEL :
36 dB(A)
LOW
HIGH
30 dB(A)
33 dB(A)
CONDITION
:
MODEL
: ST-NPFL 24
SOUND LEVEL :
39 dB(A)
LOW
HIGH
33 dB(A)
37 dB(A)
CONDITION
:
MODEL
: ST-NPFL 48
SOUND LEVEL :
44 dB(A)
LOW
HIGH
37 dB(A)
41 dB(A)
CONDITION
:
MODEL
: ST-NPFL 36
SOUND LEVEL :
42 dB(A)
LOW
HIGH
35 dB(A)
40 dB(A)
CONDITION
:
NC-20
NC-30
NC-40
NC-50
4000
63
125 250
8000
2000
1000
500
60
50
40
30
20
10
NC-20
NC-30
NC-40
NC-50
4000
63
125 250
8000
2000
1000
500
60
50
40
30
20
10
NC-20
NC-30
NC-40
NC-50
4000
63
125 250
8000
2000
1000
500
60
50
40
30
20
10
NC-20
NC-30
NC-40
NC-50
4000
63
125 250
8000
2000
1000
500
60
50
40
30
20
10
NC-20
NC-30
NC-40
NC-50
4000
63
125 250
8000
2000
1000
500
60
50
40
30
20
10
Strong
Weak
Both 50Hz and 60Hz
STRONG
STRONG
STRONG
STRONG
Frequency at center of sound pressure band (Hz)
Frequency at center of sound pressure band (Hz)
Frequency at center of sound pressure band (Hz)
Frequency at center of sound pressure band (Hz)
Frequency at center of sound pressure band (Hz)
Overall
Sound pressure le
v
el (dB)
(0dB = 0.0002
μ
bar)
Approximate
minimum audible
limit for
continuous noise
Overall
Sound pressure le
v
el (dB)
(0dB = 0.0002
μ
bar)
Approximate
minimum audible
limit for
continuous noise
Overall
Sound pressure le
v
el (dB)
(0dB = 0.0002
μ
bar)
Approximate
minimum audible
limit for
continuous noise
Overall
Sound pressure le
v
el (dB)
(0dB = 0.0002
μ
bar)
Approximate
minimum audible
limit for
continuous noise
Overall
Sound pressure le
v
el (dB)
(0dB = 0.0002
μ
bar)
Approximate
minimum audible
limit for
continuous noise
1 m from front of outlet at height of 1.5 m
1 m from front of outlet at height of 1.5 m
1 m from front of outlet at height of 1.5 m
1 m from front of outlet at height of 1.5 m
1 m from front of outlet at height of 1.5 m
5. Ceilin
g
-Mounted Type
5-4. Noise Criterion Curves
ST-NPFL
04-218 Airwell-4_4-5.qxp 01/06/2007 13:09 Page 84