CHAPTER 1
Operation
21
Table 1.3 lists the measurement points used for the measurements in files MNFF-01 to MNFF-
20 on the CD. These are measurement points as specified in ITU-T Rec. P.51, which deals with
a rotationally symmetrical artificial mouth and not a HATS, so care should be taken when
comparing different sets of results of measurements at these points.
Table 1.3 Measurement points used in files MNFF_01 to MNFF_20, as specified in ITU-T Rec. P.51
Measurement Point
On-axis Displacement
from Lip Plane (mm)
Off-axis Perpendicular Displacement (mm)
1
2
3
4
5
6
7
8
9
10
12.5
50
100
140
0
0
25
25
25
25
0
0
0
0
20 horizontal
40 horizontal
20 horizontal
40 horizontal
20 vertical (downwards)
40 vertical (downwards)
Distance from
Lip Plane (mm)
Azimuth Angle
Horizontal (deg.)
Elevation Angle
Vertical (deg.)
11
12
13
14
15
16
17
18
19
20
500
500
500
500
500
500
500
12.5
25
50
0
0
0
0
0
15
30
0
0
0
0
+15
+30
–15
–30
0
0
0
0
0
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