Green represents voice signal – Andrea Electronics DA-300 User Manual
Page 2

Figure 3.
Polar Plot of Directional Microphone Sensitivity Beam
(1/3 Octave Noise, Centered at 1 kHz)
Figure 1. DSDA Illustration
Figure 4.
Clean Speech Output
Summed Signals
Eliminate Noise
Noise Signal
Noise Signal
Noisy Voice Signal
Mic
Array
Adaptive
Digital Signal
Processing
Inverted Anti Noise
Signal
Nomad
Start
Mute
Volume
Help
Next
Previous
Radio
Disc Player
Navigate
Address Book
Setup
Audio
AM
FM
Preset
Stop
Review
Zero
One
Two
Three
Four
Five
Six
Seven
Eight
Nine
59
55
61
61
68
60
71
70
79
70
66
52
68
66
57
69
60
75
72
65
63
53
59
72
79
54
58
72
71
62
63
70
59
55
71
70
79
72
69
70
83
73
62
71
57
74
69
73
61
65
60
75
74
51
60
74
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
66
50
58
56
50
61
67
71
73
62
51
53
65
57
69
63
58
76
58
65
62
67
55
70
63
54
50
54
57
58
66
60
67
63
70
71
79
71
60
68
69
69
52
66
59
79
74
72
69
73
57
74
83
72
72
65
3
2
3
4
2
1
1
5
2
1
2
2
1
1
6
1
1
2
3
1
1
1
4
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
3
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
no recognition
68
54
69
68
63
66
70
74
70
66
52
81
65
64
72
52
75
62
70
64
56
60
73
80
64
70
56
56
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Score
Score
# Tries
# Tries
Score
Score
Score
Score
# Tries
# Tries
# Tries
Automobile
Radio Loud,
Both Windows
Down
Automobile
Radio Loud,
Window
Down
Automobile
Radio Loud,
Window
Down
Automobile
Radio On,
Window
Partial
Automobile
Radio On,
Window
Partial
Automobile
Radio Loud,
Both Windows
Down
Competitor
Andrea Array
Competitor
Andrea Array
Competitor
Andrea Array
Microphone
Description
64.8
67.6
60.9
67.7
0
65.7
87.50%
96.60%
49.10%
82.40%
0.00%
93.30%
Test #1
Test #2
Test #3
Radio
Andrea Electronics Corporation
45 Melville Park Road, Melville, New York 11747
www.AndreaElectronics.com
Phone/Fax: (800) 442-7787
Proven Test Results
As part of a recent series of Auto PC tests, comparative microphone tests between the Andrea
AutoArray
and a standard directional microphone used in the automotive industry were performed. 28 verbal
commands were spoken to the Auto PC using both the
AutoArray and a standard directional microphone.
Under the most rigorous road test conditions, as illustrated in Figure 4, Test 3; the Auto PC experienced a
93.3% recognition rate using the Andrea
AutoArray compared to a 0% recognition rate using the
standard directional microphone.
Andrea AutoArray™ : An illustration of microphone performance
™
Figure 2.
Voice Frequency Response @ 0˚ vs.
Background Noise Response @ 45˚ and 90˚
-100
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
0
500
1k
1.5k
2k
2.5k
3k
3.5k
4k
4.5k
5k
90˚
45˚
0˚
dBV
Hz
0˚
30˚
60˚
90˚
120˚
150˚
180˚
150˚
120˚
90˚
60˚
30˚
1000
0
5
10
15
20
25
*Green represents
voice signal
Andrea Electronics Corporation
45 Melville Park Road, Melville, New York 11747
www.AndreaElectronics.com
Phone/Fax: (800) 442-7787