Table des Matières
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Overall Sensitivity (3.0 MHz Probe)
Diameter of
Distance
Target
(d)
Reflector
(mm)
(mm)
1.58
A=44.5dB@
50
3MHz
75
100
200
2.38
A=42.0dB@
50
3MHz
75
100
200
Doppler Frequency (Hz)
500
SONOTRAX Series Ultrasonic Pocket Doppler User Manual
Two-way Attenuation
Reflection
Loss A(d)
∑B
(dB)
a
(T:mm
B
:dB)
a
T
10
4
B
43.6
17.9
a
T
10
3
B
43.6
13.5
a
T
10
3
B
43.6
13.5
a
T
10
1
B
43.6
6.5
a
T
10
4
B
43.6
17.9
a
T
10
3
B
43.6
13.5
a
T
10
2
B
43.6
9.6
a
T
10
1
B
43.6
6.5
a
B=∑B
+B
a
w
B
B
w
(dB)
(dB)
-
-
0
61.5
-
-
-
-
0
57.2
-
-
-
-
0
57.2
-
-
-
-
0
50.2
-
-
-
-
0
61.5
-
-
-
-
0
57.2
-
-
-
-
0
53.2
-
-
-
-
0
50.2
-
-
Velocity of Target (cm/s)
- 29 -
=
V
(r.m.s.)
V
(r.m.s)
C
20
log
s
n
10
mV
mV
dB
179
90
5.97
186
94
5.93
173
88
5.87
171
89
5.67
194
88
6.73
172
87
5.92
165
85
5.76
160
84
5.59
12.5
Overall
(
)
V
r
.
m
. .
s
s
Sensitivity
(
)
V
r
.
m
. .
s
n
(S=A(d)+B+C)
dB
111.9
107.63
107.5
100.3
110.2
105.1
100.9
97.8
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Table des Matières
