1. Specifications
1
1
2
3
4
5
I - 92
1-8
Noise Criterion Curves
Concealed Duct Type
MODEL
: DSAV250R5TAA
SOUND LEVEL : HIGH 34 dB(A), NC 22 / LOW 27 dB(A), NC 18
CONDITION
: Under the unit 1.5 m
SOURCE
: 220 - 230 - 240 V, 1 Phase, 50 Hz
MODEL
: DSAV360R5TAA
SOUND LEVEL : HIGH 38 dB(A), NC 30 / LOW 31 dB(A), NC 21
CONDITION
: Under the unit 1.5 m
SOURCE
: 220 - 230 - 240 V, 1 Phase, 50 Hz
1761_U_I
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
250
500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
µ
bar)
NC-50
NC-40
NC-30
NC-20
1762_U_I
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
250
500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
µ
bar)
NC-50
NC-40
NC-30
NC-20
MODEL
: DSAV480R5TAA
SOUND LEVEL : HIGH 40 dB(A), NC 33 / LOW 33 dB(A), NC 25
CONDITION
: Under the unit 1.5 m
SOURCE
: 220 - 230 - 240 V, 1 Phase, 50 Hz
1763_U_I
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
250
500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
µ
bar)
NC-50
NC-40
NC-30
NC-20
REMARKS: 1. Value obtained in the actual place where the unit is installed may be slightly higher than the values
shown in this graph because of the conditions of operation, the structure of the building, the background
noise and other factors.
2. The test results were obtained from an anechoic room.
To evaluate “Noise level” the maximum number of the measured OCTAVE BAND SOUND PRESSURE LEVEL is used.
Read the number on each BAND CENTER FREQUENCIES (horizontal axis) ranging from 63 Hz to 8000 Hz and select
the maximum value (vertical axis) among them.
NOTE
