Samsung CNH HDB Series Technical Data Book page 40

7. Sound Data
Duct S
Sound Power level
NOTE
• Specifications may be subject to change without prior notice
- Sound power level is an absolute value that a sound source
generates.
- dBA = A-weighted sound power level.
- Reference power : 1pW.
- Measured according to ISO 3741.
• NC Curve
1) CNH18HDB (AC018BNHDCH/AA)
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
125 250 500
Octave Band Center Frequency(Hz)
3) CNH30HDB (AC030BNHDCH/AA)
NC 70
NC 60
NC 55
NC 50
NC 45
NC 40
NC 35
NC 30
NC 25
NC 20
NC 15
1000 2000 4000 8000
2) CNH24HDB (AC024BNHDCH/AA)
70
70
65 65
60 60
55
55
50 50
45 45
40
40
35 35
30 30
25 25
20 20
15 15
10 10
5
5
0 0
A 125
4) CNH36HDB (AC036BNHDCH/AA)
Model
CNH18HDB (AC018BNHDCH/AA)
CNH24HDB (AC024BNHDCH/AA)
CNH30HDB (AC030BNHDCH/AA)
CNH36HDB (AC036BNHDCH/AA)
250 500 1000 2000 4000
Octave Band Center Frequency(Hz)
Unit: dB(A)
Cooling
61
62
63
65
70
65
60
NC 70
55
NC 60
50
NC 55
45
NC 50
40
NC 45
35
NC 40
30
NC 35
25
NC 30
20
NC 25
15
NC 20
10
NC 15
5
0
8000 A