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Periodic Phenomena
Kundt's tube with analog outputs
Ref : 22204
7. Experimental results
The study carried out is a verification of the theoretical results of the previous paragraph.
The data given below was obtained with the ESAO
Généris 5 software.
We suppose that the calibration was done correctly. The scale of ordinates can be arbitrary
(amplitude of the signal detected close to 0.5 to 2 V).
The data acquisitions are carried out on two channels:
The LFG is set to 346 Hz. The screen grab of Généris has the following appearance:
It is the simplest standing vibratory state of the open tube.
We immediately notice that a linear motion of the nodes has occurred. In particular, the
node is no more at the open end but at about 2.3 cm to the left.
ENGLISH
•
In the ordinate, the "Envelop
input of the ESAO
4 console.
•
In the abscissa, the "Abscissa" output is connected to the direct input 2 of the
ESAO
4 console. The configuration is selected in the following manner: the
magnitude is d and dm is its unit. The validation is done automatically with a
Difference of 0.2 %.
7.1
Case when the tube is open
N
4 console then processed using the
" output of the unit is connected to a direct
V
V
V
V
V
20
N
N
N
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