依据标准：EN ISO 3744
l 各测量点坐标位置
|
Coordinates of the six measurement positions
|
|
Position
|
X (m)
|
Y (m)
|
Z (m)
|
|
2
|
-2.98
|
2.5
|
0.3
|
|
4
|
1.50
|
1.50
|
1.50
|
|
6
|
2.50
|
2.00
|
1.55
|
|
8
|
-2.45
|
-2.00
|
1.45
|
|
10
|
0.00
|
0.00
|
3.00
|
|
12
|
3.00
|
0.00
|
0.00
|
|
位置: 如图一.
|
|
机械被放置在正常反射平面.
|
|
机械在测量前需充分热机。
|
测量结果如下表进行处理 Unit: dB(A) reference 20μPa
|
Pos.
|
A-weighted
sound pressure
level (L′pA)
|
background
noise level
(L′′pA)
|
Background
noise correction
K1A
|
emission sound
pressure level
(LpA)
|
|
2
|
93.5
|
45.6
|
0.0
|
89.5
|
|
4
|
92.5
|
45.7
|
0.0
|
91.2
|
|
6
|
92.1
|
45.5
|
0.0
|
90.1
|
|
8
|
92.6
|
45.2
|
0.0
|
90.6
|
|
10
|
92.8
|
45.4
|
0.0
|
89.8
|
|
12
|
90.5
|
45.4
|
0.0
|
90.5
|
|
Mean A-weighted emission sound pressure level (LpA):Averaged over all the bystander positions
|
90.1
|
