– I-67 –
MODEL
: AC425C
SOUND LEVEL
: HIGH
39 dB(A),
NC 34
LOW
34 dB(A),
NC 26
CONDITION
: Distance 1 m,
Under the unit 1 m
SOURCE
: 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
µ
bar)
63
125
250
500
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
: AC436C
SOUND LEVEL
: HIGH
42 dB(A),
NC 36
LOW
35 dB(A),
NC 28
CONDITION
: Distance 1 m,
Under the unit 1 m
SOURCE
: 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
µ
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
1222_X_I
NC-20
MODEL
: AC448C
SOUND LEVEL
: HIGH
44 dB(A),
NC 38
LOW
37 dB(A),
NC 31
CONDITION
: Distance 1 m,
Under the unit 1 m
SOURCE
: 220 - 230 - 240 V, 1 Phase, 50 Hz
1223_X_I
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
µ
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
Ceiling Mounted Type
