BRUEL & KJAER HATS 4606, User Manual

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High-frequency Head and Torso Simulator (HF HATS) Type 5128 – User Manual 16
Table 2.3 lists the 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 2.3 Measurement points as specified in ITU-T Rec. P.51
Measurement Point
On-axis Displacement
from Lip Plane (mm)
Off-axis Perpendicular Displacement (mm)
1 12.5 0
2 50 0
3 100 0
4 140 0
5 0 20 horizontal
6 0 40 horizontal
7 25 20 horizontal
8 25 40 horizontal
9 25 20 vertical (downwards)
10 25 40 vertical (downwards)
Distance from
Lip Plane (mm)
Azimuth Angle
Horizontal (deg.)
Elevation Angle
Vertical (deg.)
11 500 0 0
12 500 0 +15
13 500 0 +30
14 500 0 –15
15 500 0 –30
16 500 15 0
17 500 30 0
18 12.5 0 0
19 25 0 0
20 50 0 0