Digital Signal Processing Reference
In-Depth Information
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120
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60
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120
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60
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150
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180
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0
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0
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210
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330
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210
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240
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270
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270
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(a)
(b)
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−20
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120
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60
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120
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60
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30
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180
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0
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210
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330
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210
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240
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240
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300
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270
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270
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(c)
(d)
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90
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−10
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−20
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−30
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−40
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0
dB
−10
dB
−20
dB
−30
dB
−40
dB
120
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60
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120
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60
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150
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30
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150
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30
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210
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330
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240
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270
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(e)
(f)
FIG. 7.15
Patterns of the third-order hypercardioid for several frequencies and two values
of
Δ
: (a)
F
=0
.
5 kHz,
Δ
=0
.
5 cm, (b)
F
=0
.
5 kHz,
Δ
= 1 cm, (c)
F
= 1 kHz,
Δ
=0
.
5 cm,
(d)
F
= 1 kHz,
Δ
= 1 cm, (e)
F
= 3 kHz,
Δ
=0
.
5 cm, and (f)
F
= 3 kHz,
Δ
= 1 cm.
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