Airwell EFL 100-3R410, Technical Manual, Page: 237 / 328

4
4 - 104
3-WAY FLOW LOGIC Unit Specifications
6. Concealed Duct Type
6-4. Noise Criterion Curves
MODEL : ST-NDLP 7
ST-NDLP 9
ST-NDLP 12
SOUND LEVEL : HIGH 29 dB(A), NC 20 / LOW 22 dB(A), NC 13
CONDITION : Under the unit 1.5 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125 250 500 1000 2000 4000 8 000
NC-50
NC-40
NC-30
NC-20
MODEL : ST-NDLP 1 8
SOUND LEVEL : HIGH 30 dB(A), NC 23 / LOW 25 dB(A), NC 17
CONDITION : Under the unit 1.5 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
MODEL : ST-NDLP 24
SOUND LEVEL : HIGH 34 dB(A), NC 22 / LOW 27 dB(A), NC 1 8
CONDITION : Under the unit 1.5 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125 250 500 1000 2000 4000 8 000
NC-50
NC-40
NC-30
NC-20
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125 250 500 1000 2000 4000 8 000
NC-50
NC-40
NC-30
NC-20
Sound Pressure Le
v
e
l (dB)
(0 dB = 0.0002
μ
bar)
Sound Pressure Le
v
e
l (dB)
(0 dB = 0.0002
μ
bar)
Frequency at center of sound pressure band (Hz) Frequency at center of sound pressure band (Hz)
Sound Pressure Le
v
e
l (dB)
(0 dB = 0.0002
μ
bar)
Frequency at center of sound pressure band (Hz)
04-218 Airwell-4_6-7.qxp 01/06/2007 13:24 Page 104