90
75
60
45
30
15
0
−15
−30
−45
−60
−75
−90
100
Figure 10. Vertical directivity plots of the 4410A. Colour bar indicates dB level.
20
15
10
5
0
100
100
95
90
85
80
100
Figure 11. Directivity index (top) and power response (bottom).
15
4410A vertical plane, normalized with on−axis
1k
Frequency (Hz)
4410A directivity index
1k
Frequency (Hz)
4410A power response
1k
Frequency (Hz)
10k
10k
10k
0
−3
−6
−9
−12
−15
−18
−21
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