EDAN SONOTRAX Basic User Manual - page 42
SONOTRAX Series Ultrasonic Pocket Doppler User Manual Overall Sensitivity
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Appendix 3 Overall Sensitivity
Overall Sensitivity (2MHz Probe)
Two-way Attenuation
B=∑B
a
+B
w
Diameter of Target
Reflector
(mm)
Distance
(d)
(mm)
Reflection Loss A(d)
∑B
a
(T:mm B
a
:dB)
B
w
(dB)
B
(dB)
V
s
(r.m.s.)
mV
V
n
(r.m.s)
mV
(
)
(
)
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
=
.
.
.
.
.
.
log
20
10
s
m
r
V
s
m
r
V
C
n
s
dB
Overall Sensitivity
(S=A(d)+B+C)
dB
T 20
4.8 4.0
-
50 45.7
B
a
40
9.6 8.0
-
0 57.6
186
94
5.93
109.2
T 20
4.8 3.4
-
75 45.7
B
a
40
9.6 6.8
-
0 56.4
175
90
5.78
107.8
T 20
4.8 3.4
-
100 45.7
B
a
40
9.6 6.8
-
0 56.4
174
89
5.82
107.9
T 20
4.8 - -
1.58
A=45.7dB@
2MHz
200 45.7
B
a
40
9.6 - -
0 49.6
173
90
5.68
100.9
T 20
4.8 3.4
2.2
50
43.2
B
a
40
9.6 6.8
4.4
0 60.8
178
89
6.02
110.0
T 20
4.8 3.4
1
75 43.2
B
a
40
9.6 6.8
2
0 58.4
170
90
5.52
107.1
T 20
4.8 3.4
-
100 43.2
B
a
40
9.6 6.8
-
0 56.4
165
85
5.76
105.3
T 20
4.8 1 -
2.38
A=43.2dB@
2MHz
200 43.2
B
a
40
9.6 2 -
0 51.6
160
85
5.49
100.2
Doppler Frequency (Hz)
333
Velocity of Target (cm/s)
12.5