77.. SSound D
ound Data
ata
Sound Pressure level
Unit: dB(A)
2)
CNH12HDB (AC012BNHDCH/AA)
•
NC Curve
1) CNH09HDB (AC009BNHDCH/AA)
3)
CNH18HDB (AC018BNHDCH/AA)
4)
CNH24HDB (AC024BNHDCH/AA)
NOTE
•
Specifications may be subject to change without prior notice.
- Sound pressure level is obtained in an anechoic room.
- Sound pressure level is a relative value, depending on the distance and acoustic environment.
- Sound pressure level may differ depending on operation condition.
- dBA = A weighted sound pressure level
-
Reference acoustic pressure 0 dB = 20μPa
Model
High
Mid
CNH09HDB (AC009BNHDCH/AA)
30
27
CNH12HDB (AC012BNHDCH/AA)
31
28
CNH18HDB (AC018BNHDCH/AA)
34
30
Low
23
25
26
CNH24HDB (AC024BNHDCH/AA)
Duct S
2m
2m
Suction
Discharge
Duct
Duct
Microphone
36
32
28
60
60
60
60
NC 60
NC 60
55
55
55
55
NC 55
High
NC 55
5 0
High
50
50
50
NC 50
NC 50
45
45
45
45
NC 45
Mid
NC 45
4
0
Mid
40
40
40
NC 40
35
NC 40
35
35
35
NC 35
Low
Low
3
0
30
NC 35
30
30
NC 30
25
25
NC 30
25
25
20
NC 25
20
20
NC 25
20
15
NC 20
15
15
NC 20
15
10
NC 15
10
10
NC 15
10
Hearing threshold
5
5
Hearing threshold
5
5
0
0
63
125
250
500
1000
Octave Band Center Frequency(Hz)
2000
4000
8000
0
0
63
125
250
500
1000
Octave Band Center Frequency(Hz)
2000
4000
8000
60
60
60
60
NC 60
NC 60
55
55
55
55
NC 55
NC 55
50
50
50
High
High
50
NC 50
NC 50
45
45
45
45
Mid
NC 45
Mid
NC 45
40
40
40
40
NC 40
NC 40
35
Low
35
35
Low
35
NC 35
NC 35
30
30
30
30
NC 30
NC 30
25
25
25
25
20
NC 25
20
20
NC 25
20
15
NC 20
15
15
NC 20
15
10
NC 15
10
10
NC 15
10
Hearing threshold
5
5
Hearing threshold
5
5
0
0
63
125
250
500
1000
Octave Band Center Frequency(Hz)
2000
4000
8000
0
0
63
125
250
500
1000
Octave Band Center Frequency(Hz)
2000
4000
8000
Sound
P
ress
ur
e L
eve
l (d
B)
Sound
P
ress
ur
e L
eve
l (d
B)
Sound
P
ress
ur
e L
eve
l (d
B)
Sound
P
ress
ur
e L
eve
l (d
B)