Samsung CNH HDB Series Technical Data Book page 39

7 7 . . S S ound D ound Data ata
Duct S
Sound Pressure level
Discharge
Duct
2m
• NC Curve
1) CNH18HDB (AC018BNHDCH/AA)
60
55
50
High
45
Mid
40
35
Low
30
25
20
15
10
Hearing threshold
5
0
63 125
3) CNH30HDB (AC030BNHDCH/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
Suction
Duct
2m
Microphone
250 500 1000 2000 4000
Octave Band Center Frequency(Hz)
CNH18HDB (AC018BNHDCH/AA)
CNH24HDB (AC024BNHDCH/AA)
CNH30HDB (AC030BNHDCH/AA)
CNH36HDB (AC036BNHDCH/AA)
2) CNH24HDB (AC024BNHDCH/AA)
60
60
NC 60
55
55
50
NC 55
50
High
NC 50
45
45
Mid
NC 45
40
40
NC 40
35 Low
35
NC 35
30
30
NC 30
25
25
NC 25
20
20
NC 20
15
15
NC 15
10
10
Hearing threshold
5
5
0
0
8000
4) CNH36HDB (AC036BNHDCH/AA)
Model
High
40
41
41
43
63 125 250 500 1000
Octave Band Center Frequency(Hz)
Unit: dB(A)
Mid Low
36 32
37 33
37 33
39 35
60
NC 60
55
NC 55
50
NC 50
45
NC 45
40
NC 40
35
NC 35
30
NC 30
25
NC 25
20
NC 20
15
NC 15
10
5
0
2000 4000 8000