7. Sound Data
32
Sound Pressure level
Unit: dB(A)
Microphone
Front
1m
1.5m
Model
Cooling Silent 1 Silent 2 Silent 3
AM180MXVDGH/ET
64
59
56
49
• NR Curve
1) AM180MXVDGH/ET
AM180MXVDGH/ET
NR 65
NR 60
NR 55
NR 50
NR 45
NR 40
NR 35
NR 30
NR 25
NR 20
NR 15
Hearing
threshold
Cooling
Silent 1
Silent 2
Silent 3
NR 90
NR 85
NR 80
NR 75
NR 70
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
63
125
250
500
1000
2000
4000
8000
So
un
d
Pr
es
su
re
L
ev
el
(d
B)
Octave Band Center Frequency(Hz)
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
