1-771-76
1-8.Noise Criterion Curves
Ceiling (Type T1)
MODEL:S-26PT1U6
SOUND LEVEL:HIGH 40 dB(A),NC34
LOW 36 dB(A),NC26
CONDITION:
Distance 3.3 ft., Under the unit 3.3 ft.
SOURCE:208 - 230 V, 1 Phase, 60 Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
63 125 250500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-20
NC-40
NC-50
NC-30
1221_X_I
MODEL:S-36PT1U6
SOUND LEVEL:HIGH 46 dB(A), NC 39
LOW 37 dB(A),NC31
CONDITION:
Distance 3.3 ft., Under the unit 3.3 ft.
SOURCE:208 - 230 V, 1 Phase,60Hz
MODEL:S-42PT1U6
SOUND LEVEL:HIGH 47 dB(A),NC40
LOW 38 dB(A),NC32
CONDITION:
Distance 3.3 ft., Under the unit 3.3 ft.
SOURCE:208 - 230 V, 1 Phase,60Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
63 125250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-40
NC-50
NC-30
2113_X_I
NC-20
2114_X_I
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-40
NC-50
NC-30
NC-20
1
SM830203-04.indb 76 15/10/16 10:44:43