
Williams Sound
®
Helping People Hear
20
6
12
18
24
30
36
42
48
54
60
40
60
80
100
120
140
160
180
200
FEET
METERS
– 90
– 80
– 70
– 60
– 50
– 40
– 30
– 20
– 10
0
10
20
30
40
50
60
70
80
90
1 Channel, 1 nW/sq cm
(Approx. 28000 sq ft, 2600 sq m)
2 Channel, 1 nW/sq cm per channel
(Approx. 18000 sq ft, 1700 sq m)
4 Channel, 1 nW/sq cm per channel
(Approx. 11000 sq ft, 1000 sq m)
1 Channel, 1 nW/sq cm
2 Channels, 1 nW/sq cm per channel
4 Channels, 1 nW/sq cm per channel
HORIZONTAL RADIATION POLAR PATTERNS
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR
VERTICAL RADIATION POLAR PATTERNS
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR
20
6
12
18
24
30
36
42
48
54
60
40
60
80
100
120
140
160
180
200
FEET
METERS
– 90
– 80
– 70
– 60
– 50
– 40
– 30
– 20
– 10
0
10
20
30
40
50
60
70
80
90
FIG 14: Horizontal and Vertical Radiation Polar Plots
Reflections of the infrared light from walls, ceilings, and floors may change these patterns.
Important: remember to point the emitter towards the listening audience!
If you’re not getting sufficient coverage with a single, properly installed TX9 Emitter, you’ll need to
add additional emitters to achieve full coverage of your listening area (see page 16,
Using Multiple
Emitters
). Figures 15a and 15b illustrate how multiple emitters can be used for large room
installations.
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