Sound pressure level
Model
Heating
AM036CNBDCH/AA
26
AM048CNBDCH/AA
26
AM096CNBDCH/AA
AM144CNBDCH/AA
31
Unit: dB(A)
• NC Curve
1) AM036CNBDCH/AA
2) AM048CNBDCH/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
9. Sound Data
Hydro Unit HE
27
90
90
9 0
90
85
85
8 5
85
80
80
8 0
80
75
75
7 5
75
70
70
7 0
70
65
65
6 5
65
60
NC 70
60
6 0
NC 70
60
55
NC 60
55
5 5
NC 60
55
50
NC 55
50
5 0
NC 55
50
45
NC 50
45
4 5
NC 50
45
40
NC 45
40
4 0
NC 45
40
35
NC 40
35
3 5
NC 40
35
30
NC 35
30
30
NC 35
30
25
NC 30
25
NC 30
25
20
Heating
NC 25
20
NC 25
20
15
NC 20
Hearing threshold
15
NC 20
15
10
NC 15
0
NC 15
0
5
5
0
0
0
0
63
125
250
500
1000
2000
4000
8000
63
125
250
500
1000
2000
4000
8000
Octave Band Center Frequency(Hz)
Octave Band Center Frequency(Hz)
3) AM096CNBDCH/AA
4) AM144CNBDCH/AA
90
90
90
85
85
85
80
80
80
75
75
75
70
70
70
65
65
65
60
NC 70
60
NC 70
60
55
NC 60
55
NC 60
55
50
NC 55
50
NC 55
50
45
NC 50
45
NC 50
45
40
NC 45
40
NC 45
40
35
NC 40
35
NC 40
35
30
NC 35
30
NC 35
30
25
NC 30
25
NC 30
25
20
Heating
NC 25
20
NC 25
20
15
NC 20
15
NC 20
15
10
Hearing threshold
NC 15
10
NC 15
0
5
0
0
63
125
250
500
1000
2000
4000
8000
63
125
250
500
1000
2000 4000
8000
Octave Band Center Frequency(Hz)
Octave Band Center Frequency(Hz)
1
5
1
5
1
5
5
0
Sound
Pressure
Level (d
B)
Sou
nd Pressure Level
(d
B)
Sound
Pr
es
sur
e
Lev
el
(dB
)
Sound
Pr
ess
ur
e
Leve
l (
dB
)
90
85
80
75
70
65
60
55
50
45
40
35
30
5
0
20
15
10
25
Heating
Hearing threshold
25
20
Heating
15
10
Hearing threshold
1.5
m
1m
Microphone
Front
