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Les langues disponibles
Les langues disponibles
Ultrasounds
Moduson table
Ref :
223 008
Determine the minimum angular variation that produces the highest amplitude on the
oscilloscope screen.
∆θ≈ ..........
Conclusion :
Are ultrasonic waves directional?
What is the value of the angle of a transmitter transmission cone?
Draw the transmission cone on the diagram below.
Note: The experiment can be repeated by using the second recess for the displacement of
the receiver.
1.3 Step 3: Exploitation of the results
Notion of sound direction or « sound radiation »:
We call « sound radiation » the direction of transmission from the transmitter to the receiver
corresponding to the peak amplitude of the signal received by the receiver. An arrow
symbolises its direction.
Representation of sound radiation
Represent this radiation on the diagram below.
ENGLISH
Plot the corresponding graph below:
a
(V)
0,35
0,3
0,25
0,2
0,15
0,1
0,05
0
-40
-30
Approximation of the measurement:
-15
0
15
E
R
55
θ
(°)
30
40
Transmitter
Receiver
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