User's Manual
SD5/SD6 Ultrasonic TableTop Doppler User Manual Overall Sensitivity
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Appendix 4 Overall Sensitivity
A4.1 Overall Sensitivity of SD5 (2MHz Wired Probe)
Diameter of
Target
Reflector
(mm)
Distance
(d)(mm)
Reflection
Loss A(d)
Two-way Attenuation
B=∑B
a
+B
w
V
S
(r.m.s)
mV
V
n
(r.m.s)
mV
(
)
( )
=
...
...
log20
10
smrV
smrV
C
n
s
dB
Overall Sensitivity
(S=A(d)+B+C)
dB
∑B
(T: ultrasonic attenuation
phantom No. B
a
:dB)
B
w
(dB)
B
(dB)
1.58
A=45.7dB@
2MHz
50 39.8
T
6#6#6#1#
0 78.3 70.06 31.43 6.96 125.06
B
a
78.3
75 43.3
T
6#6#6#
0 74.6 69.39 29.83 7.33 125.23
B
a
74.6
100 45.8
T
6#6#5#4#
0 72.6 69.72 29.66 7.42 125.82
B
a
72.6
200 51.8
T
6#6#4#3#
0 67.6 54.04 29.35 5.30 124.70
B
a
67.6
2.38
A=43.2dB@
2MHz
50 37.2
T
6#6#6#2#
0 80.0 60.47 31.09 5.78 122.98
B
a
80.0
75 40.7
T
6#6#6#1#
0 78.3 58.64 30.32 5.73 124.73
B
a
78.3
100 43.2
T
6#6#6#1#
0 78.3 63.61 30.74 6.32 127.82
B
a
78.3
200 49.2
T
6#6#4#3#
0 67.6 52.58 29.31 5.08 121.88
B
a
67.6
Doppler Frequency (Hz) 200
Velocity of Target
(cm/s)
10